$9x^3-27x^2-x$
$a^6-2b^3a^3+b^6$
$\left|-29-1\right|$
$2\left(-\frac{9}{5}z-1\right)$
$x^2-y^1$
$\left(30x+40\right)\left(x-30\right)$
$\ln e^2+\ln\:e^2$
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