ab - a²b = ab(1 - a)
-p²q² - p³q⁴ = -p²q²(1 + pq²)
15c(a+b) + 8(b+a) = (a+b)(15c + 8)
a/(b-c) + 3/(c-b) = a/(b-c) - 3/(b-c) = (a-3)/(b-c)
xy³ + 5x²y² - 3x⁴y⁵ = xy²(y + 5x - 3x³y³)
12a³b⁴ - 36a²b + 44abc = 4ab(3a²b³ - 9a + 11c)
(a-4)³ + 8a(a-4) = (a-4)((a-4)² + 8a) = (a-4)(a² - 8a + 16 + 8a) = (a-4)(a² + 16)