$\frac{7m}{5}\left(\frac{5m}{13}+\frac{13n}{17}\right)-\frac{17n}{7}\left(7+\frac{7m}{5}\right)$
$\left(x^2+x+8\right)e^{x-6}$
$\left(\frac{m^6t}{7}\right)^2$
$x^2+\frac{1}{4}x=0$
$x-3\le12$
$3x^4y^2+3x^4y^2$
$ab\:+\:8ba$
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