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Calculus Level 5

There exist positive integers \(A\), \(B\), \(C\) such that \[ \int_1^{\sqrt{2}} \sqrt{\frac{4x^2+1}{x^2-1}} \frac{dx}{x} \; = \; \tfrac{1}{A}\pi + \ln B - \tan^{-1}C.\] What is the value of \(A + B + C?\)

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