$25a^8-36b^{10}$
$\sqrt{16+9}+\:8$
$b^7+1$
$6n\left(9+12n\right)-n^2$
$4\left(x-5\right)^2-2\left(x+4\right)^3$
$27\:\left(+3\right)$
$\frac{8y^2-50}{2y-5}$
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