$\int_{-\infty}^{-1}\left(\frac{2x}{x^2-3x-4}\right)dx$
$\left(x-5\right)\left(x-5\right)\left(y-4\right)\left(y-4\right)$
$4x^5-36x$
$\frac{x^3+x^2+x-1}{x+1}$
$\int\frac{csch^2x}{2\:+\:cothx}dx$
$\frac{1}{1-z^5}$
$x^2\frac{dy}{dx}+xy-\frac{1}{x}=0$
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