59270000*ln(0.326086957*x)/x=14840
    59270000*ln(0.207792208*x)/x=14840
    0.213＝0.4179x＋0.0013
    59270000*ln(0.128571429*x)/x=14840
    59270000*ln(0.129032258*x)/x=14840
    X^6-11/4X^4-1/4X^2=1
    x/(x+85140.48)=0.2
    3x+1大于-5（x-1） 4/3x-5大于等于（6-5x）/3
    x/(x+85140.48+37.4)=0.2
    14641(1+r)^3+16105(1+r)^2+17716(1+r)+19487=10000(1+r)^7+11000(1+r)^6+12000(1+r)^5+13310(1+r)^4
    x^3-2*x^2-4=0
    170.5882353 = 29.75X^2+0.7858X-0.0022
    5x^(2)－184x＋476＝0
    x-(3x-2)小于等于4 （1-2x）/4小于1-x
    85.29411765 = 29.75X^2+0.7858X-0.0022
    1044=59270000*ln(x*0.673992674)/x
    17.05882353 = 29.75X^2+0.7858X-0.0022
    x-(3x-2)小于等于4 （1-2x）小于1-x
    1044=59270000*ln(x*0.740104912)/x
    8.529411765 = 29.75X^2+0.7858X-0.0022

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