$28x^5y^6+12x^3y^6$
$\frac{\left(10n^3+15n^2-65n-31\right)}{\left(10n+5\right)}$
$-\frac{\sqrt{3}}{2}\sin\:\left(x\right)+\frac{1}{2}\cos\:\left(x\right)$
$5x+13\ge-37$
$\left(11+21\right)-20-\left(35-12\right)+20-\left(-55\right)$
$-23-\left(19+2\right)$
$\left(5x\:-\:y\right)^2$
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