arctan0.0737
    （1/25-20）*（-5）
    999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/1132716961
    99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/7669
    999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/51767
    9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/557
    9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/2503
    999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/829
    999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/6481
    99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/4021
    999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/2377
    9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/857772733
    9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/1094479651
    99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/21001
    99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/1587221
    999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/16419517
    999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/240396841140769
    9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/31511
    99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/215257037
    9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999/712767480971213008079

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