2
4*x - 30*x + 32
----------------
2
(x + 2)*(x - 4) (32.0 + 4.0*x^2 - 30.0*x)/((2.0 + x)*(-4.0 + x)^2)
2*(16 + x*(-15 + 2*x))
----------------------
2
(-4 + x) *(2 + x) 2
32 - 30*x + 4*x
----------------
3 2
32 + x - 6*x