(-64.0 + y^2)*(-9.0 + y)/((-8.0 + y)*(64.0 + y^2 - 16.0*y))
/ 2\ \-64 + y /*(-9 + y) ------------------------- / 2 \ (-8 + y)*\64 + y - 16*y/
/ 2\ \-64 + y /*(-9 + y) --------------------------- (-8 + y)*(64 + y*(-16 + y))
/ 2\ \-64 + y /*(-9 + y) ------------------------- / 2 \ (-8 + y)*\64 + y - 16*y/