14710*（1+x）^4=20875
    （0+9.24+0.01V）
    13x+18=284
    （1034+31.02+0.01K+190.62）×15%=
    （1034+31.02+0.01K+190.62）×15%
    （x/90）-(x/150)=20
    (0.000071-c)(0.00093-2c)^2=(0.0001-c)(0.0004-2c)^2
    x^3+25x-25=0
    √3x=√(4-3x^2)-x
    x➗80-x＝1.5
    x➗180-x＝1.5
    y＝y-2-2y
    y＝y-1+y^2-2y-1-y^2
    y＝y-1+y2-2y-1-y2
    5x^2-42x+80=0
    (5304.7-y)/y＝2.6%
    (5166.4-y)/y＝2.2%
    (5143.4-y)/y＝2.3%
    (5142.4-y)/y＝2.3%
    (5098.6-y)/y＝2.1%

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