l3lab/ntp-mathlib huggingface dataset:
instance colimitSemiring : Semiring.{max v u} <| R.{v, u} F :=
  { (R.{v, u} F).str,
    AddCommMonCat.FilteredColimits.colimitAddCommMonoid
      (F ⋙ forget₂ SemiRingCat AddCommMonCat.{max v u}) with
    mul_zero := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [mul_zero x]
      rfl
    zero_mul := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [zero_mul x]
      rfl
    left_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; intro x y z
      cases' x with j₁ x; cases' y with j₂ y; cases' z with j₃ z
      let k := IsFiltered.max₃ j₁ j₂ j₃
      let f := IsFiltered.firstToMax₃ j₁ j₂ j₃
      

Proof state:
case mk.mk.mk
J : Type v
inst✝¹ : SmallCategory J
F : J ⥤ SemiRingCatMax
inst✝ : IsFiltered J
src✝¹ : Monoid ↑(R F) := (R F).str
src✝ : AddCommMonoid ↑(AddCommMonCat.FilteredColimits.M (F ⋙ forget₂ SemiRingCat AddCommMonCat)) :=
  AddCommMonCat.FilteredColimits.colimitAddCommMonoid (F ⋙ forget₂ SemiRingCat AddCommMonCat)
j₁ : J
x : ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j₁
j₂ : J
y : ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j₂
j₃ : J
z : ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j₃
k : J := IsFiltered.max₃ j₁ j₂ j₃
f : j₁ ⟶ IsFiltered.max₃ j₁ j₂ j₃ := IsFiltered.firstToMax₃ j₁ j₂ j₃
⊢ Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } *
      (Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₂, snd := y } +
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₃, snd := z }) =
    Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₂, snd := y } +
      Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₃, snd := z }

Next tactic:
let g := IsFiltered.secondToMax₃ j₁ j₂ j₃
instance colimitSemiring : Semiring.{max v u} <| R.{v, u} F :=
  { (R.{v, u} F).str,
    AddCommMonCat.FilteredColimits.colimitAddCommMonoid
      (F ⋙ forget₂ SemiRingCat AddCommMonCat.{max v u}) with
    mul_zero := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [mul_zero x]
      rfl
    zero_mul := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [zero_mul x]
      rfl
    left_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; intro x y z
      cases' x with j₁ x; cases' y with j₂ y; cases' z with j₃ z
      let k := IsFiltered.max₃ j₁ j₂ j₃
      let f := IsFiltered.firstToMax₃ j₁ j₂ j₃
      let g := IsFiltered.secondToMax₃ j₁ j₂ j₃
      

Proof state:
case mk.mk.mk
J : Type v
inst✝¹ : SmallCategory J
F : J ⥤ SemiRingCatMax
inst✝ : IsFiltered J
src✝¹ : Monoid ↑(R F) := (R F).str
src✝ : AddCommMonoid ↑(AddCommMonCat.FilteredColimits.M (F ⋙ forget₂ SemiRingCat AddCommMonCat)) :=
  AddCommMonCat.FilteredColimits.colimitAddCommMonoid (F ⋙ forget₂ SemiRingCat AddCommMonCat)
j₁ : J
x : ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j₁
j₂ : J
y : ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j₂
j₃ : J
z : ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j₃
k : J := IsFiltered.max₃ j₁ j₂ j₃
f : j₁ ⟶ IsFiltered.max₃ j₁ j₂ j₃ := IsFiltered.firstToMax₃ j₁ j₂ j₃
g : j₂ ⟶ IsFiltered.max₃ j₁ j₂ j₃ := IsFiltered.secondToMax₃ j₁ j₂ j₃
⊢ Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } *
      (Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₂, snd := y } +
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₃, snd := z }) =
    Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₂, snd := y } +
      Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₃, snd := z }

Next tactic:
let h := IsFiltered.thirdToMax₃ j₁ j₂ j₃
instance colimitSemiring : Semiring.{max v u} <| R.{v, u} F :=
  { (R.{v, u} F).str,
    AddCommMonCat.FilteredColimits.colimitAddCommMonoid
      (F ⋙ forget₂ SemiRingCat AddCommMonCat.{max v u}) with
    mul_zero := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [mul_zero x]
      rfl
    zero_mul := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [zero_mul x]
      rfl
    left_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; intro x y z
      cases' x with j₁ x; cases' y with j₂ y; cases' z with j₃ z
      let k := IsFiltered.max₃ j₁ j₂ j₃
      let f := IsFiltered.firstToMax₃ j₁ j₂ j₃
      let g := IsFiltered.secondToMax₃ j₁ j₂ j₃
      let h := IsFiltered.thirdToMax₃ j₁ j₂ j₃
      

Proof state:
case mk.mk.mk
J : Type v
inst✝¹ : SmallCategory J
F : J ⥤ SemiRingCatMax
inst✝ : IsFiltered J
src✝¹ : Monoid ↑(R F) := (R F).str
src✝ : AddCommMonoid ↑(AddCommMonCat.FilteredColimits.M (F ⋙ forget₂ SemiRingCat AddCommMonCat)) :=
  AddCommMonCat.FilteredColimits.colimitAddCommMonoid (F ⋙ forget₂ SemiRingCat AddCommMonCat)
j₁ : J
x : ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j₁
j₂ : J
y : ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j₂
j₃ : J
z : ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j₃
k : J := IsFiltered.max₃ j₁ j₂ j₃
f : j₁ ⟶ IsFiltered.max₃ j₁ j₂ j₃ := IsFiltered.firstToMax₃ j₁ j₂ j₃
g : j₂ ⟶ IsFiltered.max₃ j₁ j₂ j₃ := IsFiltered.secondToMax₃ j₁ j₂ j₃
h : j₃ ⟶ IsFiltered.max₃ j₁ j₂ j₃ := IsFiltered.thirdToMax₃ j₁ j₂ j₃
⊢ Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } *
      (Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₂, snd := y } +
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₃, snd := z }) =
    Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₂, snd := y } +
      Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₃, snd := z }

Next tactic:
erw [colimit_add_mk_eq _ ⟨j₂, _⟩ ⟨j₃, _⟩ k g h, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨k, _⟩ k f (𝟙 k),
        colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₂, _⟩ k f g, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₃, _⟩ k f h,
        colimit_add_mk_eq _ ⟨k, _⟩ ⟨k, _⟩ k (𝟙 k) (𝟙 k)]
instance colimitSemiring : Semiring.{max v u} <| R.{v, u} F :=
  { (R.{v, u} F).str,
    AddCommMonCat.FilteredColimits.colimitAddCommMonoid
      (F ⋙ forget₂ SemiRingCat AddCommMonCat.{max v u}) with
    mul_zero := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [mul_zero x]
      rfl
    zero_mul := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [zero_mul x]
      rfl
    left_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; intro x y z
      cases' x with j₁ x; cases' y with j₂ y; cases' z with j₃ z
      let k := IsFiltered.max₃ j₁ j₂ j₃
      let f := IsFiltered.firstToMax₃ j₁ j₂ j₃
      let g := IsFiltered.secondToMax₃ j₁ j₂ j₃
      let h := IsFiltered.thirdToMax₃ j₁ j₂ j₃
      erw [colimit_add_mk_eq _ ⟨j₂, _⟩ ⟨j₃, _⟩ k g h, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨k, _⟩ k f (𝟙 k),
        colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₂, _⟩ k f g, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₃, _⟩ k f h,
        colimit_add_mk_eq _ ⟨k, _⟩ ⟨k, _⟩ k (𝟙 k) (𝟙 k)]
      simp only [CategoryTheory.Functor.map_id, id_apply]
      erw [left_distrib (F.map f x) (F.map g y) (F.map h z)]
      rfl
    right_distrib := fun x y z => by
      

Proof state:
J : Type v
inst✝¹ : SmallCategory J
F : J ⥤ SemiRingCatMax
inst✝ : IsFiltered J
src✝¹ : Monoid ↑(R F) := (R F).str
src✝ : AddCommMonoid ↑(AddCommMonCat.FilteredColimits.M (F ⋙ forget₂ SemiRingCat AddCommMonCat)) :=
  AddCommMonCat.FilteredColimits.colimitAddCommMonoid (F ⋙ forget₂ SemiRingCat AddCommMonCat)
x y z : ↑(R F)
⊢ (x + y) * z = x * z + y * z

Next tactic:
refine Quot.induction_on₃ x y z ?_
instance colimitSemiring : Semiring.{max v u} <| R.{v, u} F :=
  { (R.{v, u} F).str,
    AddCommMonCat.FilteredColimits.colimitAddCommMonoid
      (F ⋙ forget₂ SemiRingCat AddCommMonCat.{max v u}) with
    mul_zero := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [mul_zero x]
      rfl
    zero_mul := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [zero_mul x]
      rfl
    left_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; intro x y z
      cases' x with j₁ x; cases' y with j₂ y; cases' z with j₃ z
      let k := IsFiltered.max₃ j₁ j₂ j₃
      let f := IsFiltered.firstToMax₃ j₁ j₂ j₃
      let g := IsFiltered.secondToMax₃ j₁ j₂ j₃
      let h := IsFiltered.thirdToMax₃ j₁ j₂ j₃
      erw [colimit_add_mk_eq _ ⟨j₂, _⟩ ⟨j₃, _⟩ k g h, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨k, _⟩ k f (𝟙 k),
        colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₂, _⟩ k f g, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₃, _⟩ k f h,
        colimit_add_mk_eq _ ⟨k, _⟩ ⟨k, _⟩ k (𝟙 k) (𝟙 k)]
      simp only [CategoryTheory.Functor.map_id, id_apply]
      erw [left_distrib (F.map f x) (F.map g y) (F.map h z)]
      rfl
    right_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; 

Proof state:
J : Type v
inst✝¹ : SmallCategory J
F : J ⥤ SemiRingCatMax
inst✝ : IsFiltered J
src✝¹ : Monoid ↑(R F) := (R F).str
src✝ : AddCommMonoid ↑(AddCommMonCat.FilteredColimits.M (F ⋙ forget₂ SemiRingCat AddCommMonCat)) :=
  AddCommMonCat.FilteredColimits.colimitAddCommMonoid (F ⋙ forget₂ SemiRingCat AddCommMonCat)
x y z : ↑(R F)
⊢ ∀ (a b c : (j : J) × ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j),
    (Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) a +
          Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) b) *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) c =
      Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) a *
          Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) c +
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) b *
          Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) c

Next tactic:
clear x y z
instance colimitSemiring : Semiring.{max v u} <| R.{v, u} F :=
  { (R.{v, u} F).str,
    AddCommMonCat.FilteredColimits.colimitAddCommMonoid
      (F ⋙ forget₂ SemiRingCat AddCommMonCat.{max v u}) with
    mul_zero := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [mul_zero x]
      rfl
    zero_mul := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [zero_mul x]
      rfl
    left_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; intro x y z
      cases' x with j₁ x; cases' y with j₂ y; cases' z with j₃ z
      let k := IsFiltered.max₃ j₁ j₂ j₃
      let f := IsFiltered.firstToMax₃ j₁ j₂ j₃
      let g := IsFiltered.secondToMax₃ j₁ j₂ j₃
      let h := IsFiltered.thirdToMax₃ j₁ j₂ j₃
      erw [colimit_add_mk_eq _ ⟨j₂, _⟩ ⟨j₃, _⟩ k g h, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨k, _⟩ k f (𝟙 k),
        colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₂, _⟩ k f g, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₃, _⟩ k f h,
        colimit_add_mk_eq _ ⟨k, _⟩ ⟨k, _⟩ k (𝟙 k) (𝟙 k)]
      simp only [CategoryTheory.Functor.map_id, id_apply]
      erw [left_distrib (F.map f x) (F.map g y) (F.map h z)]
      rfl
    right_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; 

Proof state:
J : Type v
inst✝¹ : SmallCategory J
F : J ⥤ SemiRingCatMax
inst✝ : IsFiltered J
src✝¹ : Monoid ↑(R F) := (R F).str
src✝ : AddCommMonoid ↑(AddCommMonCat.FilteredColimits.M (F ⋙ forget₂ SemiRingCat AddCommMonCat)) :=
  AddCommMonCat.FilteredColimits.colimitAddCommMonoid (F ⋙ forget₂ SemiRingCat AddCommMonCat)
⊢ ∀ (a b c : (j : J) × ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j),
    (Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) a +
          Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) b) *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) c =
      Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) a *
          Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) c +
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) b *
          Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) c

Next tactic:
intro x y z
instance colimitSemiring : Semiring.{max v u} <| R.{v, u} F :=
  { (R.{v, u} F).str,
    AddCommMonCat.FilteredColimits.colimitAddCommMonoid
      (F ⋙ forget₂ SemiRingCat AddCommMonCat.{max v u}) with
    mul_zero := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [mul_zero x]
      rfl
    zero_mul := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [zero_mul x]
      rfl
    left_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; intro x y z
      cases' x with j₁ x; cases' y with j₂ y; cases' z with j₃ z
      let k := IsFiltered.max₃ j₁ j₂ j₃
      let f := IsFiltered.firstToMax₃ j₁ j₂ j₃
      let g := IsFiltered.secondToMax₃ j₁ j₂ j₃
      let h := IsFiltered.thirdToMax₃ j₁ j₂ j₃
      erw [colimit_add_mk_eq _ ⟨j₂, _⟩ ⟨j₃, _⟩ k g h, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨k, _⟩ k f (𝟙 k),
        colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₂, _⟩ k f g, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₃, _⟩ k f h,
        colimit_add_mk_eq _ ⟨k, _⟩ ⟨k, _⟩ k (𝟙 k) (𝟙 k)]
      simp only [CategoryTheory.Functor.map_id, id_apply]
      erw [left_distrib (F.map f x) (F.map g y) (F.map h z)]
      rfl
    right_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; intro x y z
      

Proof state:
J : Type v
inst✝¹ : SmallCategory J
F : J ⥤ SemiRingCatMax
inst✝ : IsFiltered J
src✝¹ : Monoid ↑(R F) := (R F).str
src✝ : AddCommMonoid ↑(AddCommMonCat.FilteredColimits.M (F ⋙ forget₂ SemiRingCat AddCommMonCat)) :=
  AddCommMonCat.FilteredColimits.colimitAddCommMonoid (F ⋙ forget₂ SemiRingCat AddCommMonCat)
x y z : (j : J) × ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j
⊢ (Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) x +
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) y) *
      Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) z =
    Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) x *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) z +
      Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) y *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) z

Next tactic:
cases' x with j₁ x
instance colimitSemiring : Semiring.{max v u} <| R.{v, u} F :=
  { (R.{v, u} F).str,
    AddCommMonCat.FilteredColimits.colimitAddCommMonoid
      (F ⋙ forget₂ SemiRingCat AddCommMonCat.{max v u}) with
    mul_zero := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [mul_zero x]
      rfl
    zero_mul := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [zero_mul x]
      rfl
    left_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; intro x y z
      cases' x with j₁ x; cases' y with j₂ y; cases' z with j₃ z
      let k := IsFiltered.max₃ j₁ j₂ j₃
      let f := IsFiltered.firstToMax₃ j₁ j₂ j₃
      let g := IsFiltered.secondToMax₃ j₁ j₂ j₃
      let h := IsFiltered.thirdToMax₃ j₁ j₂ j₃
      erw [colimit_add_mk_eq _ ⟨j₂, _⟩ ⟨j₃, _⟩ k g h, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨k, _⟩ k f (𝟙 k),
        colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₂, _⟩ k f g, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₃, _⟩ k f h,
        colimit_add_mk_eq _ ⟨k, _⟩ ⟨k, _⟩ k (𝟙 k) (𝟙 k)]
      simp only [CategoryTheory.Functor.map_id, id_apply]
      erw [left_distrib (F.map f x) (F.map g y) (F.map h z)]
      rfl
    right_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; intro x y z
      cases' x with j₁ x; 

Proof state:
case mk
J : Type v
inst✝¹ : SmallCategory J
F : J ⥤ SemiRingCatMax
inst✝ : IsFiltered J
src✝¹ : Monoid ↑(R F) := (R F).str
src✝ : AddCommMonoid ↑(AddCommMonCat.FilteredColimits.M (F ⋙ forget₂ SemiRingCat AddCommMonCat)) :=
  AddCommMonCat.FilteredColimits.colimitAddCommMonoid (F ⋙ forget₂ SemiRingCat AddCommMonCat)
y z : (j : J) × ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j
j₁ : J
x : ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j₁
⊢ (Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } +
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) y) *
      Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) z =
    Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) z +
      Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) y *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) z

Next tactic:
cases' y with j₂ y
instance colimitSemiring : Semiring.{max v u} <| R.{v, u} F :=
  { (R.{v, u} F).str,
    AddCommMonCat.FilteredColimits.colimitAddCommMonoid
      (F ⋙ forget₂ SemiRingCat AddCommMonCat.{max v u}) with
    mul_zero := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [mul_zero x]
      rfl
    zero_mul := fun x => by
      refine Quot.inductionOn x ?_; clear x; intro x
      cases' x with j x
      erw [colimit_zero_eq _ j, colimit_mul_mk_eq _ ⟨j, _⟩ ⟨j, _⟩ j (𝟙 j) (𝟙 j)]
      rw [CategoryTheory.Functor.map_id]
      dsimp
      rw [zero_mul x]
      rfl
    left_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; intro x y z
      cases' x with j₁ x; cases' y with j₂ y; cases' z with j₃ z
      let k := IsFiltered.max₃ j₁ j₂ j₃
      let f := IsFiltered.firstToMax₃ j₁ j₂ j₃
      let g := IsFiltered.secondToMax₃ j₁ j₂ j₃
      let h := IsFiltered.thirdToMax₃ j₁ j₂ j₃
      erw [colimit_add_mk_eq _ ⟨j₂, _⟩ ⟨j₃, _⟩ k g h, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨k, _⟩ k f (𝟙 k),
        colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₂, _⟩ k f g, colimit_mul_mk_eq _ ⟨j₁, _⟩ ⟨j₃, _⟩ k f h,
        colimit_add_mk_eq _ ⟨k, _⟩ ⟨k, _⟩ k (𝟙 k) (𝟙 k)]
      simp only [CategoryTheory.Functor.map_id, id_apply]
      erw [left_distrib (F.map f x) (F.map g y) (F.map h z)]
      rfl
    right_distrib := fun x y z => by
      refine Quot.induction_on₃ x y z ?_; clear x y z; intro x y z
      cases' x with j₁ x; cases' y with j₂ y; 

Proof state:
case mk.mk
J : Type v
inst✝¹ : SmallCategory J
F : J ⥤ SemiRingCatMax
inst✝ : IsFiltered J
src✝¹ : Monoid ↑(R F) := (R F).str
src✝ : AddCommMonoid ↑(AddCommMonCat.FilteredColimits.M (F ⋙ forget₂ SemiRingCat AddCommMonCat)) :=
  AddCommMonCat.FilteredColimits.colimitAddCommMonoid (F ⋙ forget₂ SemiRingCat AddCommMonCat)
z : (j : J) × ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j
j₁ : J
x : ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j₁
j₂ : J
y : ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat).obj j₂
⊢ (Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } +
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₂, snd := y }) *
      Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) z =
    Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₁, snd := x } *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) z +
      Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) { fst := j₂, snd := y } *
        Quot.mk (Types.Quot.Rel ((F ⋙ forget₂ SemiRingCatMax MonCat) ⋙ forget MonCat)) z

Next tactic:
cases' z with j₃ z