$-2-2+-2\left(-2\right)^3$
$\frac{dy}{dx}=\frac{3x}{y}+\frac{8}{y}$
$\sqrt{x-3}-\sqrt{2x+2};\:x=7$
$\lim_{x\to0}\left(\frac{1-e^{2x}}{sin\:x}\right)$
$\tan^2x+5\tan x+6=0$
$\lim_{x\to-1.99}\left(\frac{x^2-4}{x+2}\right)$
$\int\left(\frac{5}{\left(2x+3\right)^2}\right)dx$
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