Find the area of the region between the graph of f(x) = √x^2 - 9 and the x-axis over the interval [6, 13]. Enter your answer as an exact answer. Be sure to include the argument of the logarithmic function in parentheses.
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Find the area of the region between the graph of f(x) = √x^2 - 9 and the x-axis over the interval [6, 13]. Enter your answer as an exact answer. Be sure to include the argument of the logarithmic function in parentheses.