1. x⁶/6; ln x + x²/2
2. arctg(x + 2) + C; sin(x) - (sin³x)/3 + c;
3. (3x² - 6)sin(x) - (x³ - 6x)cos(x) + C; 2xcos(x) + (x² - 2)sin(x) + C;
4. 240 + 3/4

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