$\frac{2z^2-8}{x^2+4x+4}$
$\frac{dy}{dx}=e^xy=e^{-y}+e^{-2x-y}$
$16x^{21}-100y^6$
$\int_{\frac{\pi}{6}}^{\frac{5\pi}{6}}\left(2\right)dx$
$2x^2=18x-36$
$-3-4-5-6-7-8$
$3\left(x+3\right)=15$
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