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int(x^2-1)/(x^3sqrt(2x^4-2x^2+1))dx is e...

`int(x^2-1)/(x^3sqrt(2x^4-2x^2+1))dx` is equal to
(a) `(sqrt(2x^4-2x^2+1))/(x^3)+C`
(b) `(sqrt(2x^4-2x^2+1))/x+C`
(c) `(sqrt(2x^4-2x^2+1))/(x^2)+C`
(d) `(sqrt(2x^4-2x^2+1))/(2x^2)+C`

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