$4-2x\le8$
$7x^2-8x+1$
$\frac{t}{-5}+25=-15$
$\left(+5\right)\left(-7\right)+\left(-3\right)$
$-\:90xy\:+\:72xy\:-\:85xy\:+\:125xy\:-\:36xy\:+\:2xy$
$-7\:2-9-5$
$\left(\sqrt{\frac{x}{x-8}}\right)$
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