$a^3-b^3=28$
$m^3-2m^2n+\:mn^2$
$4\left(-3\right)^2\left(\frac{1}{2}\right)-6\left(-3\right)\left(\frac{1}{2}\right)\left(-\frac{1}{3}\right)+2\left(\frac{1}{2}\right)^2+\left(-3\right)^2\left(-\frac{1}{3}\right)$
$\left(-4\right)+\left(-44\right)+\left(-444\right)$
$4x^2-2x+2$
$\lim_{x\to\infty}\left(\frac{e^x}{3+\cos\left(x\right)}\right)$
$3x-18<-90$
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