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It's 98.45 (rounded to the nearest 0.05) according to his signature!The integral in his signature is equal to pi (I looked that up). The brackets in "19.(...)" is a standard limit converging to exp(x), so it corresponds to exp(pi^2 / 6), which means his ENTER is:19 exp(pi^2 / 6) ~= 98.4329804
Good stuff. Yeah, Real/Complex Analysis is quite Pgradish.