$\frac{1+csc\:\left(x\right)}{cot\:\left(x\right)}-sec\left(x\right)=tan\:\left(x\right)$
$4x+2=-8x+26$
$\left(x^2-y^2-z^2\right)^3$
$\left(4xy\right)\left(-2xy\right)$
$-x^2+4x-6=0$
$9x^2-17x-5$
$\arctan\left(x\right)=0$
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