$\frac{m^2n+mn^2}{\sqrt[3]{m^2}-\sqrt[3]{n^2}}$
$x^2-4x+5<0$
$\frac{tan\:x-\:senx}{tanx}$
$2tan^2\theta\:=1$
$\frac{5}{6}c^2-\frac{2}{3}c^2$
$\lim_{x\to0}\left(5^{\frac{1}{x}}\right)$
$\frac{x-1}{4x+4}-\frac{x+2}{8x-8}$
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