$2x^2-6x-8$
$2y^5z^2\cdot y^4z^5$
$0,3w-0,7w$
$\int\left(x^3\left(\sqrt{\frac{1}{2}x^2-2}\right)\right)dx$
$16m^4-25n^6$
$2\left(cos^{\left(2\right)}\left(\theta\:\right)-sin^{\left(2\right)}\left(\theta\:\right)\right)=1$
$3x^2-21$
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