2 x -------- 2 (x - 2)
x^2/(x - 2)^2
1 + 4/(-2 + x) + 4/(-2 + x)^2
4 4 1 + ------ + --------- -2 + x 2 (-2 + x)
0.25*x^2/(-1 + 0.5*x)^2
-4 + 4*x 1 + ------------ 2 4 + x - 4*x
1 + (-4 + 4*x)/(4 + x^2 - 4*x)