$\left(+135\right).15$
$x\left|3\right|+2^2-4x-8$
$x^2=20x$
$\left(-2i+1\right)^3$
$\left(-3a^5b^4c\right)^3$
$\frac{x^3-2x+4}{x+1}$
$lny=x^2+3$
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