$180m^2-5$
$\frac{3}{7}\cdot\frac{7}{3}$
$2tan^2x\:=\:6$
$149\le26s+45$
$25^x=5^{x^2-3}$
$7x+3y-2x$
$\lim_{x\to0}\left(\frac{lnx-1}{x-e}\right)$
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