Вариант 7. 1) ∫ from –2 to 2 (x² – 6x) dx; 2) ∫ from 2 to 5 (8 – x²) dx; 3) ∫ from 0 to 2 (4x³ + x – 5) dx; 4) ∫ from 0 to π/4 (3dx / cos² x); 5) ∫ from –2 to 2 (dx / (x + 3)²).