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(12*x + 8*Sin[2*x] + Sin[4*x])/32

Integrate[Cos[x]^4, x] ==
(12*x + 8*Sin[2*x] + Sin[4*x])/32 

                4
Integrate[Cos[x] , x] == 

12 x + 8 Sin[2 x] + Sin[4 x]
----------------------------
             32
Time to compute: < 0.01 second
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