$-8+7+11+15-25+16-17$
$3x^4-60x^2+192$
$3x^2+2x-2xy$
$\frac{\csc^2\left(x\right)}{\cot\left(x\right)}=\tan\left(x\right)+\cot\left(x\right)$
$\sqrt{x}^{-4}$
$x^2\:14x+49$
$25x^2+100x=0$
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