If f(x)f(x)f(x) is a differentiable function such that ∫13f(x)dx=4\int_1^3 f(x) dx = 4∫13f(x)dx=4, what is the value of ∫13(3f(x)+2)dx\int_1^3 (3f(x) + 2) dx∫13(3f(x)+2)dx?
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