Evaluate the integral.
A. 
x3 sin 3x + 
x2 cos 3x - 
x sin 3x - 
cos 3x + C
B. 
x3 cos 3x + 
x2 sin 3x - 
x cos 3x - 
sin 3x + C
C. 
x3 sin 3x + 1x2 cos 3x - 2x sin 3x - 2 cos 3x + C
D. 
x3 sin 3x - 
x2 cos 3x + 
x sin 3x + 
cos 3x + C
Answer: A
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