$530\:+\:-872$
$2x+1<5$
$\left(x^2-2x+1\right)\frac{x+1}{x^3-1}$
$-3^2\left(6+4\right)$
$v+12v$
$\left(3y^2\right)^2$
$x^2-3x-8$
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