Don't know the steps in finding this derivative.
But the derivative is
Now simplify:
The answer is:
2 / 2 \
x + 1 |x + 1 |
x *|------ + 2*x*log(x)|
\ x /
/ 2 \
2 | / 2 \ 2|
1 + x | |1 + x | 1 + x |
x *|4 + |------ + 2*x*log(x)| + 2*log(x) - ------|
| \ x / 2 |
\ x /
/ 3 \
2 |/ 2 \ / 2\ / 2 \ / 2\|
1 + x ||1 + x | 2*\1 + x / |1 + x | | 1 + x ||
x *||------ + 2*x*log(x)| + ---------- + 3*|------ + 2*x*log(x)|*|4 + 2*log(x) - ------||
|\ x / 3 \ x / | 2 ||
\ x \ x //