ring
R : Type u
inst✝ : CommRing R
r s t : R
e : Model R
⊢ (-(b2 e + 12 * r) * b2 e + -(b2 e + 12 * r) * (12 * r)) * b8 e =
    -(b2 e ^ 2 * b8 e) + (-(3 * r) * b2 e + -(b2 e + 12 * r) * (3 * r)) * (4 * b8 e)
no goals