Evaluate
x^{3}-6x-3\ln(\frac{|x-1|}{|x+1|})
Differentiate w.r.t. x
\frac{3\left(|x-1|x^{3}+|x-1|x^{2}-xsign(x-1)-2x|x-1|-|x-1|-sign(x-1)\right)}{|x-1|\left(x+1\right)}
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