∀ {R : Type u_1} {M : Type u_2} [inst : AddMonoid R] [inst_1 : AddMonoid M],
  autoParam
    (∀ (n : ℕ) (x : TrivSqZeroExt R M),
      TrivSqZeroExt.addMonoid._aux_3 (n + 1) x = TrivSqZeroExt.addMonoid._aux_3 n x + x)
    AddMonoid.nsmul_succ._autoParam