-x^0.5/(36.0 + x)^2 + 0.5*x^(-0.5)/(36.0 + x)
3/2 5/2 ___ 2 - 72*x - 2*x + \/ x *(36 + x) ------------------------------------ 3 2*x*(36 + x)
/ 1 \ |-------| | ___| ___ \2*\/ x / \/ x --------- - --------- x + 36 2 (x + 36)
-(-36 + x) ------------------------------ 5/2 3/2 ___ 2*x + 144*x + 2592*\/ x