90-arctan(0.2*12.14)-arctan(0.0625*12.14)
    arctan(0.034*66.5)-90-arctan(0.0068*66.5)-arctan(0.1*66.5)
    1/66.5/0.2^0.5
    arctan(0.032*64)-90-arctan(0.00752*64)-arctan(0.1*64)
    arctan(0.32*64)-90-arctan(0.00752*64)-arctan(0.1*64)
    1/64/0.235^0.5
    90-arctan(4.4166)
    (44-x)(6-2x)^2=(16-x)(7-2x)^2
    (6-x)(44-2x)^2=(7-x)（18-2x）^2
    0.0007x=3^2x
    (0.00017-x)(0.00126-2x)^2=(0.0002-x)(0.0005-2x)^2
    3x^4-8x^3=-8
    12：30-11：40
    12a-3504.19-0.23=0
    X=0.045X+16300
    0.0962/(1-0.871406)+3.0609*0.2547/(3.0609-0.871406)+0.1213*0.6491/(0.1213-0.871406)
    0.0962/(1-2.356)+3.0609*0.2547/(3.0609-2.356)+0.1213*0.6491/(0.1213-2.356)
    0.0962/(1-2.355)+3.0609*0.2547/(3.0609-2.355)+0.1213*0.6491/(0.1213-2.355)
    0.0962/(1-2.345)+3.0609*0.2547/(3.0609-2.345)+0.1213*0.6491/(0.1213-2.345)
    0.0962/(1-2.365)+3.0609*0.2547/(3.0609-2.365)+0.1213*0.6491/(0.1213-2.365)

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