$y^2-2y=-3x-1$
$7-9x=34$
$\left(x^3-2x-21\right)^3$
$\frac{-5x-2}{4}<\frac{2-7x}{-2}$
$-\left(+5\right)+\left(-4\right)+\left(-7\right)-\left(-8\right)$
$2g-6g$
$-5\cdot8+20$
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