4a^2 - x^4
X^3 + 1
2ab + 4crb
2x^2 + 5x - 3
a^3 - 1
x^2 + 5x + 6
a^2b^3 - 5b^4 - 6a^2 + 30b
(x^2 + 2a) (x^2 - 2a)
(b^3 - 6) (a^2 - 5b)
(x + 2) (x + 3)
2b(1a + 2cr)
(x + 3) (2x -1)
(x + 1) (x^2 - x + 1)
(a-1) (a^2 + a + 1)
