$\frac{d}{dx}wxy$
$34-65+89+88+765$
$\left|2+\left(-19\right)\right|$
$64a^6-9b^2$
$7^3\cdot7^2\cdot7^3$
$\lim_{x\to0}\frac{\left(x-4\right)^2-16}{0}$
$\left(x+15\right)\left(x+15\right)$
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