$\frac{\tan\left(x\right)}{\sin\left(x\right)}+\csc\left(x\right)$
$4x^2-6x+8$
$5m^2+3mn-4m+7m^2-8mn-m$
$\lim_{x\to4}\left(\frac{\sqrt{x-2}}{x^2-16}\right)$
$\:4x\:-\:4\:-\:8x$
$\frac{dy}{dx}+\left(\cot\left(x\right)y\right)=\csc\left(x\right)$
$-2+-5+8+-3+-2u+-8$
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