$60x\:=\:18x$
$-2\cdot3-6$
$\frac{x^4-16}{x-4}$
$x+5\le-2$
$\lim_{x\to1}\left(x^3+2x^2+3x\right)$
$x^2+1+81$
$x\:\frac{dy}{dx}=y\left(x^2+x\right)$
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