$\frac{216+w^3z^6}{6-wz^2}$
$-6\left(-60\right)\left(-4\right)$
$8x-9>5$
$-2-4\cdot\left(5-9\right)$
$\lim_{x\to-4}\left(\frac{2x^2+7x-4}{x+4}\right)$
$2x^2+3x+1=5$
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