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(x*Sqrt[9 + x^2] + 9*ArcSinh[x/3])/2

Integrate[Sqrt[9 + x^2], x] ==
(x*Sqrt[9 + x^2] + 9*ArcSinh[x/3])/2 

                    2
Integrate[Sqrt[9 + x ], x] == 

            2              x
x Sqrt[9 + x ] + 9 ArcSinh[-]
                           3
-----------------------------
              2
Time to compute: 0.01 second
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