replace h := FunLike.congr_fun h 2
case left
m n q p : ℕ
h : m • Nat.factorization 2 + n • Nat.factorization 3 = p • Nat.factorization 2 + q • Nat.factorization 3
⊢ m = p
case left
m n q p : ℕ
h : ↑(m • Nat.factorization 2 + n • Nat.factorization 3) 2 = ↑(p • Nat.factorization 2 + q • Nat.factorization 3) 2
⊢ m = p