5x-1<3（x+1）
    4x^2+4x=9
    2x-1/3-5x+1/2≤1
    x（x+1）>x（x+3）
    x^3 + x^2 + x = 1
    x^3 = 1
    x^2-920x+66667=0
    x^2 -1 = 1
    (18.6*17.15+24.98*12.44+23.01*6+6.44*(-2.78)+13.53*(-5.96)+13.44*x)/100=18.99
    (18.6*17.15+24.98*12.44+23.01*6+6.44*(-2.78)+13.53*(-5.96)+13.44*x/100=18.99
    0.1*(8.33^2/H^2)-H-1.71=0
    9x^2-4x^3-8000=0
    (18.6*17.15+24.98*12.44+23.01*6+6.44*(-2.78)+13.53*x)/86.47=7.74
    (18.6*17.15+24.98*12.44+23.01*6+6.44*(-2.78)+13.53*x/86.47=7.74
    100000*(x*0.0001/(1.4128-x*0.0001))+500000*(x*0.0001/(4.3250-x*0.0001))+200000*（x/(14675.0000-x))+63.75-41.93=0
    (18.6*17.15+24.98*12.44+23.01*6+6.44*x)/80.03=9.37
    (18.6*17.15+24.98*12.44+23.01*x)/66.59=11.53
    x^2 = 1
    0.05*(8.33^2/H^2)-H+0.753=0
    42q+38（1-q）=40

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