Wolfram Mathematica Online Integrator
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Integrate[x^2/(-1 + x^4), x] ==
(2*ArcTan[x] + Log[-1 + x] - Log[1 + x])/4
2
x
Integrate[-------, x] ==
4
-1 + x2 ArcTan[x] + Log[-1 + x] - Log[1 + x]
--------------------------------------
4
Time to compute: < 0.01 second
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