Theorem: UInt.add_neg (Algdata/Classes/UInt.lean)

State before:
α : Type
inst✝¹ : (n : Nat) → OfNat α n
inst✝ : UInt α
a b : α
⊢ a + -b = a - b
Tactic:
rw [neg_eq, ←UInt.add_sub_assoc, UInt.add_zero]
State after:
no goals