(5166.4-y)/y＝2.2%
    (5143.4-y)/y＝2.3%
    (5142.4-y)/y＝2.3%
    (5098.6-y)/y＝2.1%
    (2111.3-y)/y＝3%
    (2060.1-y)/y＝3%
    (521.7-y)/y＝7%
    (540.3-y)/y＝6.4%
    (541.1-y)/y＝7.2%
    (553.6-y)/y＝6.8%
    sin(x)+cos(2*x)+2*x=-35.5
    sin(x)+cos(2*x)-2*x=-35.5
    3x-x=2
    0.64x=16
    350cosx=340
    x-0.36x=16
    147.5cos20=148cosx
    （4/5）/2*3=x
    x*√(0.04*x^2+1)*√(0.01*x^2+1)=30
    xxx-6xx+9x-4=0

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