-90-arctan30-arctan3-arctan(300/0.375)-arctan(300/84.85)+arctan(300/3)+arctan(300/10.61)
     -90-arctan30-arctan3-arctan(300/0.375)-arctan(300/84.85)+arctan(300/3)+arctan(300/10.61)
     -90-arctan0.01-arctan0.001-arctan(0.1/0.375)-arctan(0.1/89.85)+arctan(0.1/3)+arctan(0.1/10.61)
     -90-arctan0.01-arctan0.001-arctan(0.1/0.375)-arctan(0.1/84.85)+arctan(0.1/3)+arctan(0.1/10.61)
     -90-arctan0.01-arctan0.001-arctan(0.1/0.375)-arctan(0.1/84.85)+arctan(0.1/3)+arctan(0.1/10.61)
    -90-arctan0.01-arctan0.001-arctan(0.1/0.375)-arctan(0.1/84.95)+arctan(0.1/3)+arctan(0.1/10.61)
    -90-arctan0.01-arctan0.001-arctan（0.1/0.375）- arctan（0.1/84.95）- arctan（0.1/3）- arctan（0.1/10.61）
    90-arctan3-arctan0.3
    20* lg(0.2)-20* lg(58)－20* lg(0.12*58)－20* lg(0.02*58)
    20* lg(0.2)-20* lg(55)－20* lg(0.12*55)－20* lg(0.02*55)
    20* lg(0.2)-20* lg(50)－20* lg(0.12*50)
    20* lg(0.2)-20* lg(45)－20* lg(0.12*45)
    20* lg(0.2)-20* lg(40)－20* lg(0.12*40)
    20* lg(0.2)-20* lg(26)－20* lg(0.12*26)
    20* lg(0.2)-20* lg(24)－20* lg(0.12*24)
    20* lg(0.2)-20* lg(22)－20* lg(0.12*22)
    20* lg(0.2)-20* lg(20)－20* lg(0.12*20)
    20* lg(0.2)-20* lg(18)－20* lg(0.12*18)
    20* lg(0.2)-20* lg(15)－20* lg(0.12*15)
    20* lg(0.2)-20* lg(13)－20* lg(0.12*13)

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