simp [←three_add_one_eq_four, ←two_add_one_eq_three, ←one_add_one_eq_two, add_assoc]
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐈𝚫₀ + 𝛀₁
⊢ 2 + 2 = 4
no goals