Given: $~\displaystyle \int_{0}^{6}f(x)\,dx=-2~~~$ and $~~~\displaystyle \int_{0}^{6}g(x)\,dx=3\,$.
$\displaystyle \int_{0}^{6}\big(4g(x)+2f(x)\big)\,dx\, =$ [[☃ math-keypad 1]]
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