3 5 x - x
x^3 - x^5
(x + 1)*x*(x - 1)
((x + 1)*x)*(x - 1)
3 / 2\ x *\1 - x /
x^3*(1 - x^2)
3 -x *(1 + x)*(-1 + x)
-x^3*(1 + x)*(-1 + x)