Evaluate int(x^(2))/(x^(4)-x^(2)-12)dx....

Evaluate `int(x^(2))/(x^(4)-x^(2)-12)dx`.

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The correct Answer is:

`1/7log|(x-2)/(x+2)|+(sqrt(3))/(7)"tan"^(-1)(x)/(sqrt(3))+C`

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