∀ {R : Type u_1} {A : Type u_4} {M : Type u_7} [inst : CommSemiring R] [inst_1 : Semiring A] [inst_2 : Algebra R A]
  [inst_3 : AddMonoid M],
  AddMonoidAlgebra.singleZeroAlgHom = { toRingHom := AddMonoidAlgebra.singleZeroRingHom, commutes' := ⋯ }