$\int\frac{\sqrt{x^2-a}}{x^4}dx$
$\frac{d}{dx}\left(y^2+8x=0\right)$
$\int\sqrt{400-y^2}dy$
$\frac{x^{-4}-y^{-4}}{x^{-2}-y^{-2}}$
$\frac{d}{d\theta\:}\left(acscb\theta\:\right)$
$\csc\left(u\right)=-\frac{13}{12}$
$\int\frac{1}{w^2+w+1}dx$
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