rw [add_def]
R : Type u
a✝ b✝ : R
m n : ℕ
inst✝ : Semiring R
φ : R →+* R
p q : R[X;φ]
a b : AddMonoidAlgebra R ℕ
⊢ { toFinsupp := a + b } = SkewPolynomial.add { toFinsupp := a } { toFinsupp := b }
no goals