(abs(x^2-2*x))/abs(x)=abs((3-x)/(3+2*x-x^2))
    cosx=0.996
    T-32＝45（lnT-ln32）
    T-32＝45（lnT-ln32）
    1/(1+x)+1.5/(1+x)^2+1.6/(1+x)^3-2.8=0
    (90-T2)-32＝45ln（90-T2）-ln32
    4.55/(4.55-x)=2
    x/（x-10）=3.2
    X=3X-600
    (x^2*ln(0.4*1062/x/1698))/((1-x)^2*ln(0.6*1062/(1-x)/4436))=1
    (x^2*ln(0.51*1452/x/1698))/((1-x)^2*ln(0.49*1452/(1-x)/4436))=1
    (x^2*ln(0.51*1452/x/1698))/((1-x)^2*ln(0.49*1452/(1-x)/4436))=1
    (x^2*ln(0.51*1452/x/1698))/((1-x)^2*ln(0.49*1452/(1-x)/4436))=1
    (x^2*ln(0.51*1452/x/1698))/((1-x)^2*ln(0.49*1452/(1-x)/4436))=1
    (x^2*ln(0.51*1452/x/1698))/((1-x)^2*ln(0.49*1452/(1-x)/4436))=1
    (x^2*ln(0.51*1452/x/1698))/((1-x)^2*ln(0.49*1452/(1-x)/4436))=1
    (x^2*ln(0.51*1452/x/1698))/((1-x)^2*ln(0.49*1452/(1-x)/4436))=1
    (x^2*ln(0.51*1452/x/1698))/((1-x)^2*ln(0.49*1452/(1-x)/4436))=1
    (x^2*ln(0.51*1452/x/1698))/((1-x)^2*ln(0.49*1452/(1-x)/4436))=1
    (x^2*ln(0.51*1452/x/1698))/((1-x)^2*ln(0.49*1452/(1-x)/4436))=1

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