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-Csc[a*x]^2/(2*a) - Log[Sin[a*x]]/a


Integrate[Cot[a*x]^3, x] ==
-Csc[a*x]^2/(2*a) - Log[Sin[a*x]]/a



                  3
Integrate[Cot[a x] , x] == 

         2
-Csc[a x]    Log[Sin[a x]]
---------- - -------------
   2 a             a

Time to compute: 0.01 second

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