$-2^{0}$
$\frac{2}{3x}=\frac{2x}{3}$
$\left(m^4+m^2\:n^2+n^4\right)\left(\:m^2\:-\:n^2\right)$
$13\:times\:12$
$\frac{1}{3}\left(15+10k\right)$
$25x^2-20x$
$\lim_{x\to+\infty}\left(\frac{x+in\left(3\right)}{x-in\left(3\right)}\right)$
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