$9z=-9$
$\frac{\left(2\cdot8^4+8\right)}{2}$
$c^{2+1}$
$\left(-3m^7\right)\left(2n^{11}\right)^2$
$-2a^2-4a+6$
$\sqrt[3]{a}^3$
$x^2+1\le4x-3$
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