((-8.0 + d^3)/(-4.0 + d^2) - 6.0*d/(2.0 + d))/(1.0 - 4.0/(2.0 + d))
/ 3\ / 2\ \-8 + d /*(2 + d) - 6*d*\-4 + d / --------------------------------- / 2\ \-4 + d /*(-2 + d)
/ 3\ / 2\ \-8 + d /*(2 + d) - 6*d*\-4 + d / --------------------------------- / 2\ \-4 + d /*(-2 + d)