int (1-x^(2))/(1+x^(2)).(dx)/(sqrt(1+x^(...

`int (1-x^(2))/(1+x^(2)).(dx)/(sqrt(1+x^(4))`

Verified by Experts

The correct Answer is:

`(1)/(sqrt(2))sin^(-1)((xsqrt(2))/(1+x^(2)))+c`

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