2 x + 2*x - 3 ------------ x + 1
(-3.0 + x^2 + 2.0*x)/(1.0 + x)
-3 + x*(2 + x) -------------- 1 + x
4 1 + x - ----- 1 + x
(-1 + x)*(3 + x) ---------------- 1 + x