$9b^8\:+\:24b^3$
$\frac{5x+1}{3}\le7$
$\frac{dz}{dt}=-7e^{t+z}$
$\frac{\left(x^{-2}\right)^2}{\left(x^2z^3\right)^3}$
$\left(a^{n+1}b-t^{n+2}\right)\left(a^{n+1}b+t^{n+2}\right)$
$\frac{3}{4}a^3-\left\{7\right\}$
$7\left(21\right)\:<80\left(21\right)>12\left(21\right)\:$
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