∀ {R : Type u_1} {M : Type u_2} [inst : CommSemiring R] [inst_1 : AddCommMonoid M] [inst_2 : Module R M] (x : M),
  TensorAlgebra.toDirectSum ((TensorAlgebra.ι R) x) =
    (DirectSum.of (fun n => TensorPower R n M) 1) ((PiTensorProduct.tprod R) fun x_1 => x)