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-Sqrt[4 + x^2]/(4*x)

Integrate[1/(x^2*Sqrt[4 + x^2]), x] ==
-Sqrt[4 + x^2]/(4*x) 

                 1
Integrate[---------------, x] == 
           2           2
          x  Sqrt[4 + x ]

           2
-Sqrt[4 + x ]
-------------
     4 x
Time to compute: 0.01 second
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