Question

Помогите решить интеграл!
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Answer 1

$\int {9^{x^3+6x^2}(3x^2+12x)} \, dx = \int {9^{x^3+6x^2}(x^3+6x^2)'} \, dx = \int {9^{x^3+6x^2}} \, d(x^3+6x^2) = \\= \frac{9^{x^3+6x^2}}{ln9} + C.$