2 x ---------- 2 x + x - 2
x^2/(x^2 + x - 2)
1 - 4/(3*(2 + x)) + 1/(3*(-1 + x))
4 1 1 - --------- + ---------- 3*(2 + x) 3*(-1 + x)
2 x ----------- 2 -2 + x + x
x^2/(-2 + x + x^2)
2 x -------------- -2 + x*(1 + x)
x^2/(-2 + x*(1 + x))
x^2/(-2.0 + x + x^2)
-2 + x 1 - ----------- 2 -2 + x + x
1 - (-2 + x)/(-2 + x + x^2)
2 x ---------------- (-1 + x)*(2 + x)
x^2/((-1 + x)*(2 + x))