(x + 4) (x + 5)
(x + 1) ( x + 10)
-2(x +1)(x + 3)
(x - 2) (x + 5)
(x + 7) (x - 3)
(x + 3) (x + 2)
(x+2)(x-2)
2(-x + 7)(x - 2)
x^2 -4
x^2 + 5x + 6
x^2 + 11x + 10
-2x^2 - 8x +6
x^2 + 3x - 10
-2x^2+18x - 28
x^2 + 4x - 21
x^2 + 9x + 20
