$\frac{dy}{dx}\left(y=arctan\left(\frac{x}{a}\right)+ln\sqrt{\frac{x+a}{x-a}}\right)$
$x-2>5$
$4x-8=\left(4\right)$
$x+2>\frac{7}{2}$
$5^2+1^2$
$-1-34-8$
$6x^3-10x+8$
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