/ 18 \ / 2 \ |b + 3 + -----|*\b - 6*b + 9/ \ b - 3/ ------------------------------ 2 b + 9
(3.0 + b + 18.0/(-3.0 + b))*(9.0 + b^2 - 6.0*b)/(9.0 + b^2)
/ 2 \ (18 + (-3 + b)*(3 + b))*\9 + b - 6*b/ -------------------------------------- / 2\ (-3 + b)*\9 + b /
(9 + b*(-6 + b))*(18 + (-3 + b)*(3 + b)) ---------------------------------------- / 2\ (-3 + b)*\9 + b /