$27x^6y^32^9+343x^9y^{12}2^3$
$-4\le2-3x$
$2x-14=4$
$9\:x^4+30\:x^2\:y\:+25\:y^2$
$\left(z^{-2}+1\right)^3$
$3x+17=68$
$\sqrt[3]{2x^6}$
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