$5x>50$
$x+4-5x-2$
$\sqrt{25}+\left(-5\right)+2\left(-7\right)$
$9x^2-42x+49=0$
$-\frac{21}{-3}$
$\frac{-25x^{-6}y^4-20x^3y^5}{-5x^3y^4}$
$\log\left(\frac{x^6y^{10}}{z^{12}}\right)$
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