2 4*x ----- - ------ 3 - x 2 9 - x
2.0/(3.0 - x) - 4.0*x/(9.0 - x^2)
2 18 - 2*x - 4*x*(3 - x) ----------------------- / 2\ (3 - x)*\9 - x /
/ 2 \ 2*\9 - x - 2*x*(3 - x)/ ------------------------ / 2\ (3 - x)*\9 - x /
2 ----- 3 + x