Answer
$$ = {{57\,x\,\ln \left(x^2+1\right)+38\,\ln \left(x^2+1\right)-114\,x \,\ln \left(3\,x+2\right)-76\,\ln \left(3\,x+2\right)+132\,x\, \arctan x+88\,\arctan x+208}\over{338\,\left(3\,x+2\right)}} $$
Explanation
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