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sum[sum[(-1)^(m+1)/2^n asin(m/2^n acos(m/2^n)),{m,1,2^10-1}],{n,1,10}]
sum[sum[(-1)^(m+1)/2^n asin(m/2^n acos(m/2^n)),{m,1,2^10-1}],{n,1,10}]
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