$\left(x\right)\left(x-1\right)\left(x+3\right)$
$\int_{\frac{\pi}{2}}^{\frac{\pi}{2}}\frac{x^2\sec x}{1+x^6}dx$
$\int_0^{2\pi\:}a\sqrt{2}dt$
$-8-10n-4n-10$
$2x\:+144=x$
$4x^2-4x-39$
$\tan a=0.49$
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