2 3 3*(x + 1) (x + 1) *(-4 - 2*x) ---------- + ------------------- 2 4 (x + 2) (x + 2)
3.0*(1.0 + x)^2/(2.0 + x)^2 + (1.0 + x)^3*(-4.0 - 2.0*x)/(2.0 + x)^4
2 4 3 2 3*(1 + x) *(2 + x) + (1 + x) *(2 + x) *(-4 - 2*x) -------------------------------------------------- 6 (2 + x)
2 / 2 \ (1 + x) *\3*(2 + x) + 2*(1 + x)*(-2 - x)/ ------------------------------------------ 4 (2 + x)