$\left(mn+8a\right)^2$
$81+108mn+36m^2n^2$
$\lim_{x\to0\:}\frac{tan3x}{tanx}$
$-1.5+2$
$\sqrt[4]{625}v^{50}\:u^6$
$62log_{\frac{23719}{46}}\left(2\right)$
$\frac{x^{3+1}}{x^2-9}$
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