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misal:
u = x² - x + 2 dx
du = 2x - 1 dx
4 du = (8x - 4) dx
- 4 du = (4 - 8x) dx
susbtitusikan:
int u³ (- 4 du) = - 4 (1/4)u⁴ + c
= - u⁴ + c
= - (x² - x + 2)⁴ + c