Don't know the steps in finding this derivative.
But the derivative is
Now simplify:
The answer is:
/ 1 + x\ | 2 2 - -----| 1 + x |/1 + x \ x | x *||----- + log(x)| + ---------| \\ x / x /
/ 2*(1 + x) / 1 + x\ /1 + x \\ | 3 3 - --------- 3*|2 - -----|*|----- + log(x)|| 1 + x |/1 + x \ x \ x / \ x /| x *||----- + log(x)| - ------------- + ------------------------------| |\ x / 2 x | \ x /