Hey I'm having a little trouble with this integral

$\displaystyle

\int \frac{1+x^2}{1+x^4}dx$

I know the answer just need a little nudge in the right direction with it

many thanks

Simon

EDIT dont worry I got it, stupid me forgetting

$\displaystyle

(1+x^4)=(1-\sqrt 2 x+x^2)(1+\sqrt 2 x+x^2)$