68.77=-14.51ln(x)+34.342
    72.07=-14.51ln(x)+34.342
    -4x^4 + 4x^2 -10^（-0.2425） = 0
    4x^2 -4x^4 = 10^（-3/10）
    0.687=-14.51ln(x)+34.342
    0.720=-14.51ln(x)+34.342
    (5.699-5.605)*200+(5.730-5.605)*100-0.1-0.1-(5.759-x)*200-0.2 =28.1
    (5.699-5.605)*200+(5.720-5.605)*100-0.1-0.1-(5.759-x)*200-0.2 =28.1
    (5.699-5.605)*200+(5.705-5.605)*100-0.1-0.1-(5.759-x)*200-0.2 =28.1
    x^2-x^4=0.1374
    x^2+8x-1=0
    x^2+(2+√5)+1.5-√5
    2X+5X（30-X）＝90
    210=150+330×150^2/(330^2+x^2)
    10000=150+330×150^2/(330^2+x^2)
    500=150+330×150^2/(330^2+x^2)
    1/480+1/x=1/150
    150=150+330×150^2/(330^2+x^2)
    X+0.1X=0.1
    190=150+210×150^2/(210^2+x^2)

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