Board Thread:Off Topic/@comment-28236282-20161128060141/@comment-27080660-20161201232557

x=9.16515139.

Now, let's see you guys solve this tiny little problem. (Yes, I know the answer).

(2/3 (x^2+4)^(1/2) (x^2-9)^((-2)/3)-x(x^2-9)^(1/3) (x^2+4)^((-1)/2))/(x^2+4)

