$\frac{8}{x-1}-\frac{1}{x+1}=1$
$\left(2x+7y\right)\left(6x-7y\right)$
$\frac{dy}{dx}=ay\left(29-y\right)$
$2^6+4^3+3^8$
$\frac{8ab}{-2ab}$
$x^2-120x-3746.9$
$\frac{100-2x^2}{\sqrt{100-x^2}}=0$
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