$-9x=-9$
$2-\csc^2\left(z\right)=1-\cot^2\left(z\right)$
$\left(a^2a^2b\right)^5$
$\lim_{x\to0}\left(\frac{2x^2+7x+6}{2x^2+5x+2}\right)$
$\frac{d}{dx}e^y+14-e^1=3x^2+2y^2$
$3x-2y+z=8$
$x^2-\sqrt[3]{x}+\frac{x}{z}$
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