$\frac{1}{\left(z-1\right)\left(2-z\right)}$
$697-\left(-697\right)$
$1\cdot\left(-1-2\right)$
$33x+32y=30$
$\lim_{x\to0}\left(\frac{4-x^2}{\left(3\right)\sqrt{x^2+5}}\right)$
$\frac{dy}{dx}xtany$
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