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Sqrt[-a^2 + x^2]/(a^2*x)

Integrate[1/(x^2*Sqrt[-a^2 + x^2]), x] ==
Sqrt[-a^2 + x^2]/(a^2*x) 

                  1
Integrate[-----------------, x] == 
           2        2    2
          x  Sqrt[-a  + x ]

       2    2
Sqrt[-a  + x ]
--------------
      2
     a  x
Time to compute: 0.02 second
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