$\frac{m^4}{m^2}$
$sec^2x=1-tanx$
$\:95.57-4.57$
$75\cdot15$
$\left(m\:+\:4m^2\right)$
$300.000\cdot4$
$\lim_{x\to2}\left(\frac{x+1\:-\:e^x}{x^2}\right)$
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