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