$\int\:2x^2sec^2\left(x^3\:+\:1\:\right)dx$
$8m^3-27n^3$
$x-\left(1-x\right)^2$
$\sqrt[2]{-4}$
$4r^2-2x+10-x^2+5x$
$2\:\left(-5\:-\:3d\right)$
$\lim_{x\to1}\left(\frac{4-\sqrt{x+15}}{x^2}\right)$
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