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(-9*Cos[x] + Cos[3*x])/12

Integrate[Sin[x]^3, x] ==
(-9*Cos[x] + Cos[3*x])/12 

                3
Integrate[Sin[x] , x] == 

-9 Cos[x] + Cos[3 x]
--------------------
         12
Time to compute: < 0.01 second
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