$2x-5<-12$
$\frac{5x^2-3x-2}{x^2-1}$
$\frac{dy}{dx}-4xy=6x$
$x^2y^4-z^6$
$\left(z+2\right)^2-\left(z-2\right)^2$
$x-37=-5$
$-9b^2+27b^2$
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