$z-12<1$
$a-a-b+a^2+5b$
$x+7=-5$
$2x^2\:-\:32\:=\:0$
$\sqrt{64-8\cos\left(x\right)}$
$x-2-\frac{x^2-3x+2}{x-1}=0$
$\left(5x^6-x^2+5x\right)\cdot\left(-3x^6-5x^2\right)$
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