$x^2-50x$
$x^2+2x-224$
$\left(2p+3\right)^4$
$\frac{x^2+1}{x-2}\le-2$
$\lim_{x\to\infty}\left(\sqrt[3]{x}-\sqrt[3]{2x+1}\right)$
$rs+4s$
$\int_{-2}^3\left(\frac{2}{x^4}\right)dx$
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