/a + 3 a - 3\ / 2\ |----- + -----|*\9 - a / \a - 3 a + 3/ ------------------------ 2 3*a + 27
(9.0 - a^2)*((-3.0 + a)/(3.0 + a) + (3.0 + a)/(-3.0 + a))/(27.0 + 3.0*a^2)
/ 2\ / 2 2\ \9 - a /*\(-3 + a) + (3 + a) / ------------------------------- / 2\ (-3 + a)*(3 + a)*\27 + 3*a /
/ 2\ / 2 2\ \9 - a /*\(-3 + a) + (3 + a) / ------------------------------- / 2\ 3*(-3 + a)*(3 + a)*\9 + a /