$2x^2-31x-46$
$\lim_{x\to\infty}\left(\frac{-x}{xe^{-x}}\right)$
$\lim_{x\to0}\left(\frac{x^5-1}{x^3-1}\right)$
$f\left(x\right)=\frac{x^3}{3}+\frac{23x^2}{2}-140x+9$
$\left(3p+2q\right)\left(5p-8q\right)$
$\cot\left(x\right)\left(\cos\left(^2\right)x-4\right)=0$
$\:6m\:+\:8n\:+\:5\:-\:m\:-\:n\:-\:6m\:-\:11$
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