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u = x^2+5x-11
du/dx = 2x + 5
dx = du/2x + 5
Integral (6x+15) . u^2 . du/2x+5
intgrl 3u^2
3 x 1/3 u^3
u^3
= (x^2 + 5x - 11)^3
smg membantu, maaf kalau ada kesalahan