Ok well I'm quite sure you have to use integration by parts. I will update this post when I get the answer for you.
EDIT: I had a go and it was terribly off, probably some little mistake somewhere. Anyway instead of trying again I used Maple and it only gave me:
2*(x^3+1/x+x/(x^4+1))^(3/2)/(3*x^2-1/x^2+1/(x^4+1)-4*x^4/(x^4+1)^2)
That was after a bit of work of course. Seemed it missed being able to do a reverse chain rule
. I tried simplifying it but I couldn't find anything, maybe someone else can help. I hope this helps you.