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[" The value of "cot(sum(n=1)^(23)cot^(-...

[" The value of "cot(sum_(n=1)^(23)cot^(-1)(1+sum_(k=1)^(n)2k))" is "],[[" 1) "22/24," 2) "23/25," 3) "24/23," 4) "25/23]]

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