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ln(n+Im(n(-1)^(n!/n^2+1/n+1))/(sin(pi/n)))-ln(n-n*ceil(abs(sin(1513pi/n)))), n=89
ln(n+Im(n(-1)^(n!/n^2+1/n+1))/(sin(pi/n)))-ln(n-n*ceil(abs(sin(1513pi/n)))), n=89
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