$9x^2+12xy+4^2$
$12x^5-6x^4+18x^3-30x^2$
$\frac{6\left(5\right)}{6}$
$5-6\cdot\left(4-3\right)+1$
$-x<5$
$\frac{z}{4}+7>-5$
$\left(5a^{n+1}+3a^m\right)\left(5a^{n+1}-3^m\right)$
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