$2x-4<x+3$
$\left(-2+5\right)\left(-2-1+2\right)+10$
$\left(-15\right)+0\left(-5\right)$
$-\frac{18}{tan^2\left(x\right)}$
$x^2+x-12\ge0$
$\frac{d}{dx}cos^34x$
$3a-2b+c+a-5b-6c+7a+5b-3c$
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