how do you integrate 1/(x(adsbygoogle = window.adsbygoogle || []).push({}); ^{2}+ 1)^{2}?

i have tried integration by partial fractions but when you set 1 equal to (Ax +B)(x^{2}+1) + (Cx + D) this leads to A=B=C=0 and D=1 which just gives you the original equation

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# Homework Help: How to integrate 1/(x^2 +1)^2, does partial fractions work?

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