$\left(2a^2b+3a\right)\left(2a^2b-3a\right)$
$6-12m$
$2x^{-1}$
$x^2+36x+144$
$\sqrt[8]{16}^2$
$\frac{1}{3}+1-\frac{11}{6}+\frac{9}{2}$
$0\:\cdot\:-8$
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