// 2 \\ ||c - 6*c + 9|| ||------------|| |\ c - 8 /| |--------------| \ c - 3 / ---------------- 2 64 - c
(9.0 + c^2 - 6.0*c)/((64.0 - c^2)*(-8.0 + c)*(-3.0 + c))
2 9 + c - 6*c --------------------------- / 2\ (-8 + c)*(-3 + c)*\64 - c /
9 + c*(-6 + c) --------------------------- / 2\ (-8 + c)*(-3 + c)*\64 - c /