$\left(a^3-\:1\right)^3$
$\sqrt{98x^4y^6}$
$49u^2-56uv+16v^2$
$11m^2-12m^2+10-6m^2+10m^2n-5mn^2+13$
$\left(2xy-6x+y\right)^2$
$\left(n-6\right)\left(n-12\right)$
$\frac{1}{-0.5}+\frac{1}{1}$
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