edit: nvm. i'll figure it out..... :/
Hint: Partial fractions...
I don't see how you would do partial fractions.
x^2 * (1/(x^2 +1)) then check some of you're identities. especially one that says 1 over x squared plus a squared.
It's not really partial fractions. Do polynomial division of x^2 by x^2+1 and express it as quotient+remainder/(x^2+1).
Separate names with a comma.