2 4*x - 8*x + 3 -------------- 2 4*x - 1
(3.0 + 4.0*x^2 - 8.0*x)/(-1.0 + 4.0*x^2)
3 + 4*x*(-2 + x) ---------------- 2 -1 + 4*x
-3 + 2*x -------- 1 + 2*x
4 1 - ------- 1 + 2*x