$79^2-39^2$
$\frac{1}{x-1}<\frac{1}{x+1}$
$\frac{sec^2\left(x\right)}{1+cot^2\left(x\right)}=tan^2x$
$\left(12m^5+10\right)^2$
$\left(x+2\right)\left(x+3\right)m$
$\int-6xcos3xdx$
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