λ5 * (x + 3). x
λ(x + 3) * 5. x
λ5 * (x - 3). x
λ(x - 3) * 5. x
λ5 + x - 3. x
λ5 + x - 3. x
λ5 + (x - 3). x
λ1 + x + 2 + 3. x
λ1 + (x + (2 + 3)). x
λ(p + 1) / (q + 1). p + q
λ-p / q. p + q