$p^2-21p+20$
$\int_{-1}^0e^{3x}dx$
$\int x\:3^{x^2}dx$
$\int_{\frac{-\pi}{4}}^{\frac{\pi}{4}}sen8xsen8xdx$
$\left(\frac{x}{2}+7\right)\left(\frac{x}{2}-7\right)$
$\frac{7}{6}x-3.2<\frac{9}{2}x$
$-8y^7\left(-3y\right)$
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