5 x ------ 3 x + 1
x^5/(x^3 + 1)
x^2 - 1/(3*(1 + x)) - (-1 + 2*x)/(3*(1 + x^2 - x))
2 1 -1 + 2*x x - --------- - -------------- 3*(1 + x) / 2 \ 3*\1 + x - x/
2 2 x x - ------ 3 1 + x
x^2 - x^2/(1 + x^3)
x^5/(1.0 + x^3)
5 x -------------------- / 2 \ (1 + x)*\1 + x - x/
x^5/((1 + x)*(1 + x^2 - x))