$\lim_{w\to0}\left(\frac{2e^2-3+e^{-2w}}{w^2}\right)$
$1-2mnx=4$
$\int_{-\infty}^{-1}\left(\frac{1}{x^4-1}\right)dx$
$x^2y-2y=0$
$\left(\sqrt{x-1}\right)^2+2\left(\sqrt{x-1}\right)$
$\int csc\left(\frac{5w^2}{2}+9\right)wdw$
$\frac{31.07}{25417.59}$
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