$\sqrt{x^2}-2x$
$-m^0$
$\left(1+x+x^2\right)\left(1-x-x^2\right)$
$\left(\frac{3}{2}m^3s^6\right)^8$
$\left(a^3-2b^2\right)\left(a^3+b^2\right)$
$4x^2-6x^2$
$\frac{\csc^2a}{1+\tan^2a}$
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