Don't know the steps in finding this derivative.
But the derivative is
The answer is:
log(x)
2*x *log(x)
----------------
x
log(x) / 2 \
2*x *\1 - log(x) + 2*log (x)/
----------------------------------
2
x
log(x) / 2 3 \
2*x *\-3 - 6*log (x) + 4*log (x) + 8*log(x)/
-------------------------------------------------
3
x