$\left(-\frac{1}{2}\right)\left(-4\right)\left(-8\right)$
$\lim_{x\to-1}\left(\frac{1-2x-3x^2}{1+x}\right)$
$257^2$
$\frac{1}{\sqrt{a-\sqrt{b}}}$
$-579+1230$
$16b^2-40b\:+\:25$
$\frac{1}{4}\left(2x+1\right)-x<\frac{x}{6}-\frac{1}{3}$
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