Question
Integrate the following w. r. t. x:
$\frac{2 x^2-1}{x^4+9^2+20}$
$\frac{2 x^2-1}{x^4+9^2+20}$
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$\tan ^{-1} \sqrt{3}-\sec ^{-1}(-2)$
$x=2 a t^2, y=4 a t$