（1-(1+i)^-60）/60
    60i=1-(1+i)^-60
    x*14.3*1000*3.1416*0.4*0.4*(1-sin(2*180*x)/(2*3.1415926*x))+(3*x-1.25)*360*30=0
    x*14.3*1000*3.1416*0.4*0.4*(1-sin(2*180*x)/(2*3.1415926*x))+(3*x-1.25)*360*10=0
    x*14.3*1000*3.1416*0.4*0.4*(1-sin(2*180*x)/(2*3.1415926*x))+(3*x-1.25)*360*9.852=0
    x*14.3*1000*3.1416*0.4*0.4*(1-sin(2*180*x)/(2*3.1415926*x))+(3*x-1.25)*360*9.852=0
    x*14.3*1000*3.1416*0.4*0.4*(1-sin(2*180*x)/(2*3.1415926*x))+(3*x-1.25)*360*8.621=0
    x*14.3*1000*3.1416*0.375*0.375*(1-sin(2*180*x)/(2*3.1415926*x))+(3*x-1.25)*360*7.603=0
    x*14.3*1000*3.1416*0.375*0.375*(1-sin(2*180*x)/(2*3.1415926*x))+(3*x-1.25)*360*7.854=0
    x*14.3*1000*3.1416*0.375*0.375*(1-sin(2*180*x)/(2*3.1415926*x))+(3*x-1.25)*360*4.424=0
    x*14.3*1000*3.1416*0.35*0.35*(1-sin(2*180*x)/(2*3.1415926*x))+(3*x-1.25)*360*4.424=0
    x*14.3*1000*3.1416*0.4*0.4*(1-sin(2*180*x)/(2*3.1415926*x))+(3*x-1.25)*360*4.42=0
    x*14.3*1000*3.1416*0.4*0.4*(1-sin(2*180*x)/(2*3.1415926*x))+(3*x-1.25)*300*4.42
    -x^4
    x*14.3*1000*3.1416*0.375*0.375*(1-(sin(360*x)/(2*3.1415926*x)))+(3*x-1.25)*300*5.1=0
    x*14.3*1000*3.1416*0.375*0.375*(1-(sin(360*x)/(2*3.1415926*x)))+(3*x-1.25)*300*5.1=0
    x*14.3*1000*3.1416*0.375*0.375*(1-sin(360*x)/(2*360*x))+(3*x-1.25)*300*5.1=0
    x*14.3*1000*3.1416*0.375*0.375*(1-sin(360*x)/(2*3.1416*x))+(3*x-1.25)*300*5.1=0
    x*14.3*1000*3.1416*0.375*0.375*(1-sin(360*x)/(2*3.1416*x))+(3*x-1.25)*360*8.6=0
    x*14.3*1000*3.1416*0.375*0.375*(1-sin(360*x)/(2*3.1416*x))+(3*x-1.25)*360*8.6=0

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