Evaluate
\ln(|x^{2}-15|)+\frac{\sqrt{15}\ln(\frac{|x-\sqrt{15}|}{|x+\sqrt{15}|})}{6}+С
Differentiate w.r.t. x
\frac{\sqrt{15}sign(x-\sqrt{15})x^{3}-\sqrt{15}|x-\sqrt{15}|x^{2}+12|x-\sqrt{15}|x^{2}+15sign(x-\sqrt{15})x^{2}+12\sqrt{15}x|x-\sqrt{15}|-15\sqrt{15}xsign(x-\sqrt{15})+15\sqrt{15}|x-\sqrt{15}|-225sign(x-\sqrt{15})}{6|x-\sqrt{15}|\left(x+\sqrt{15}\right)\left(x^{2}-15\right)}
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