$\frac{\left(x+n\right)^3-x^3}{n}$
$9b^2-7b^2-7+7$
$m+12\:m+2$
$y'=y^2+2y-3$
$-10n-n$
$\lim_{x\to1}\left(\sqrt{5x-1}-2\right)$
$e^{\left[x\right]}\left(\frac{dy}{dx}\right)+e^{\left[x\right]}y-2x=0$
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