-90-arctan0.1×60-arctan0.01×60-arctan(1/0.375)60-arctan(1/84.85)60＋arctan(1/3)60＋arctan(1/10.61)60=
    -90-arctan0.1×50-arctan0.01×50-arctan(1/0.375)50-arctan(1/84.85)50＋arctan(1/3)50＋arctan(1/10.61)50=
    -90-arctan0.1×40-arctan0.01×40-arctan(1/0.375)40-arctan(1/84.85)40＋arctan(1/3)40＋arctan(1/10.61)40=
    -90-arctan0.1×30-arctan0.01×30-arctan(1/0.375)30-arctan(1/84.85)30＋arctan(1/3)30＋arctan(1/10.61)30=
    -90-arctan0.1×20-arctan0.01×20-arctan(1/0.375)20-arctan(1/84.85)20＋arctan(1/3)20＋arctan(1/10.61)20=
    -90-arctan0.1×10-arctan0.01×10-arctan(1/0.375)10-arctan(1/84.85)10＋arctan(1/3)10＋arctan(1/10.61)10=
    -90-arctan0.1×10-arctan0.01×10-arctan(1/0.375)18-arctan(1/84.85)10＋arctan(1/3)10＋arctan(1/10.61)10=
    -90-arctan0.1×7-arctan0.01×7-arctan(1/0.375)7-arctan(1/84.85)7＋arctan(1/3)7＋arctan(1/10.61)7=
    -90-arctan0.1×5-arctan0.01×5-arctan(1/0.375)5-arctan(1/84.85)5＋arctan(1/3)5＋arctan(1/10.61)5=
    -90-arctan0.1×3-arctan0.01×3-arctan(1/0.375)3-arctan(1/84.85)3＋arctan(1/3)3＋arctan(1/10.61)3=
    -90-arctan0.1×1-arctan0.01×1-arctan(1/0.375)-arctan(1/84.85)＋arctan(1/3)＋arctan(1/10.61)=
    -90-arctan0.1×0.8-arctan0.01×0.8-arctan(1/0.375)0.8-arctan(1/84.85)0.8＋arctan(1/3)0.8＋arctan(1/10.61)0.8=
    -90-arctan0.1×0.7-arctan0.01×0.7-arctan(1/0.375)0.7-arctan(1/84.85)0.7＋arctan(1/3)0.7＋arctan(1/10.61)0.7=
    -90-arctan0.1×0.5-arctan0.01×0.5-arctan(1/0.375)0.5-arctan(1/84.85)0.5＋arctan(1/3)0.5＋arctan(1/10.61)0.5 =
    -90-arctan0.1×0.375-arctan0.01×0.375-arctan(1/0.375)0.375-arctan(1/84.85)0.375＋arctan(1/3)0.375＋arctan(1/10.61)0.375 =
    -90-arctan0.1×0.1-arctan0.001-arctan(1/0.375)0.1-arctan(1/84.85)0.1＋arctan(1/3)0.1＋arctan(1/10.61)0.1 =
    20lg180-20lg100-20lg50-20lg16.667
     （250×√((98.07÷3)^2＋1)×√((98.07÷10.61)^2＋1))÷(98.07×√（9.807^2＋1）×√（0.9807^2＋1）×√（(98.07÷0.375)^2＋1）×√（(98.07÷84.85)^2＋1）) =
    √2
    lg10

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