$\frac{9b^2}{21bd+3d}$
$562+\left(-352\right)+801+47$
$\frac{3}{4}x-\frac{1}{2}<\frac{1}{4}x+\frac{3}{2}$
$\lim_{x\to3}\left(-5\right)$
$10-3x>2x-5$
$5n\:-\:2\left(n-3\right)$
$2x^3+3x^2-29x+30$
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