Find the indefinite integral. [ cos 3xar sin33- sin 3r +C 6. O sna(3- sn'ax) sin3 3-sn 3 +C sn3x 3+sn“3x +C 3. O snar(3+sn*3x 4. sn3x 3+sn'3x +C 6. sn3x 3+sn 3x +C 6.

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