$\frac{8x+18}{9}<\frac{2x}{5}$
$pq-3rq+pr-3r^2$
$45\cdot99$
$-4\cdot2+2$
$10-\left(-8-2\right)$
$\int\frac{2x^5}{\sqrt{5-4x^6}}dx$
$\left(x^2m+3\:\right)^2$
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