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∫
x - (4*Tan[x])/3 + (Sec[x]^2*Tan[x])/3

Integrate[Tan[x]^4, x] ==
x - (4*Tan[x])/3 + (Sec[x]^2*Tan[x])/3 

                4
Integrate[Tan[x] , x] == 

                     2
    4 Tan[x]   Sec[x]  Tan[x]
x - -------- + --------------
       3             3
Time to compute: < 0.01 second
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