2 (2*y - 3) - 1 -------------- 2 y + 7*y - 8
(-1.0 + (-3.0 + 2.0*y)^2)/(-8.0 + y^2 + 7.0*y)
2 -1 + (-3 + 2*y) ---------------- -8 + y*(7 + y)
4*(-2 + y) ---------- 8 + y
40 4 - ----- 8 + y