$5x+2x$
$\sqrt[2]{9b^4}c^3$
$-4\left(-x-8\right)$
$\sin^2\left(x\right)-\tan\left(x\right)\cot\left(x\right)$
$x^2-29x+100$
$3x-5y+z\:\:\:x-y-3z\:$
$2x^2+10x-12\ge0$
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