Opaque OneMinusMultPlus'_e.
Definition OneMinusMultPlus_e : Cobham :=
Comp 2 OneMinusMultPlus'_e [Comp 2 Normalize_e [Proj 2 0]; Proj 2 1].

Lemma arity_OneMinusMultPlus : arity OneMinusMultPlus_e = ok_arity 2.