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Log[Cos[x]] + Sec[x]^2/2


Integrate[Tan[x]^3, x] ==
Log[Cos[x]] + Sec[x]^2/2



                3
Integrate[Tan[x] , x] == 

                    2
              Sec[x]
Log[Cos[x]] + -------
                 2

Time to compute: < 0.01 second

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