$\left[\left(859\:+\:210\right)\right]\:-\:\left[\left(-147\right)\:-\:\left(62\right)\right]$
$\int\left(\sqrt{4-2x}\right)dx$
$\int\:-e^{-x}\:dx$
$\left(+\sqrt{2}\right)\left(-\sqrt{2}\right)$
$\int\left(x-8\right)^8dx$
$x+5\le-2$
$\int_4^{\infty}\left(\frac{1}{x^2-1}\right)dx$
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