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-Cos[4*(1 + x)]/8 - (x*Sin[2])/2


Integrate[Cos[3 + 2*x]*Sin[1 + 2*x], x] ==
-Cos[4*(1 + x)]/8 - (x*Sin[2])/2



Integrate[Cos[3 + 2 x] Sin[1 + 2 x], x] == 

-Cos[4 (1 + x)]   x Sin[2]
--------------- - --------
       8             2

Time to compute: 0.03 second

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