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What to Expect: Calculating Expected Values with Probability Distributions in Wolfram|Alpha—Wolfram|Alpha Blog
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definite integrals - Why can't Wolfram Alpha calculate $\int_0^{2\pi}\sqrt{(a-\cos\theta)^2+\sin^2\theta}\ d\theta$? - Mathematics Stack Exchange
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What to Expect: Calculating Expected Values with Probability Distributions in Wolfram|Alpha—Wolfram|Alpha Blog
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