$39x^2+579$
$2x+1\le5x-2$
$\frac{64}{-2}$
$27s-9$
$\left(x^{2m}^{-1}+7\right)\left(x^{2m}^{-1}-5\right)$
$10-\left(-8-\left(15-13\right)\right)$
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