$\left(-3\right)^3+9\left(-8\right)$
$4\sec\left(\frac{\pi}{4}\right)^2$
$\lim_{x\to-\infty}\:\left[\:2e^x\right]$
$\frac{2x^3y^{-2}}{2x^2}$
$\left(\frac{1}{6}m+\frac{2}{7}y\right)\left(\frac{1}{5}m-\frac{2}{7}y\right)$
$x^4-29x^2+140$
$m\:+\:2m\:+\:1$
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