$\frac{\frac{d}{dx}23}{xy}$
$y^2+1y+30$
$-5\left(-2\right)^2+3\left(-2\right)+4$
$\lim_{x\to\infty}\left(\frac{-e^x}{x^{-2}}\right)$
$8x-3x-4x+x$
$10\:-\:\left(-2\right)$
$\frac{5x-2}{4+3x}\ge-2$
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