$81x^2-12x+36y^2$
$8x^6-3x^6-2x^6$
$a^2+a-2>\frac{1}{2}$
$x^2+10x+56$
$\log\left(\frac{r\sqrt{7}}{s^2}\right)$
$5x-3x-7$
$\sin\left(3x\right)\cos\left(4y\right)$
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