$\left(m^{-\frac{5}{2}}\right)^{-7}$
$6\left(3n+7\right)+7$
$\left(-4\right)\:x\:5\:+\:\left(-6\right)$
$b-1+5-3b$
$\frac{3}{x-2}+\frac{5}{2-x}$
$26x^2+39x$
$5x-2>3x-4$
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