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Log[a + b*x^2]/(2*b)

Integrate[x/(a + b*x^2), x] ==
Log[a + b*x^2]/(2*b) 

             x
Integrate[--------, x] == 
                 2
          a + b x

           2
Log[a + b x ]
-------------
     2 b
Time to compute: < 0.01 second
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