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    -4245.268((0.44-0.0167x)sin(140.454/(15-0.3x))-0.0823x)+90=3.34
    x^2-4x+13=0
    4245.268((0.44-0.0167x)sin(140.454/(15-0.3x))-0.0823x)-90=3.34
    (0.44-0.0167x)sin(140.454/(15-0.3x))-0.0823x=0.00021318
    288739-90.164*(1300+273.15)+8.314*(1300+273.15)ln[(100/x)-1] = 0
    288739-90.164*(1200+273.15)+8.314*(1200+273.15)ln[(100/x)-1] = 0
    288739-90.164*(700+273.15)+8.314*(700+273.15)ln[(100/x)-1] = 0
    -74435-91.715*(700+273.15)+8.314*(700+273.15)ln[(100/x)-1] = 0
    -74435-91.715*(2000+273.15)+8.314*(2000+273.15)ln[(100/x)-1] = 0
    (0.44-0.0167x)sin(140.454/(15-0.3x))-0.0823x=0.000212
    -437609-93.266*(2000+273.15)+8.314*(2000+273.15)ln[(100/x)-1] = 0
    -437609-93.266*(1000+273.15)+8.314*(1000+273.15)ln[(100/x)-1] = 0
    -437609-93.266*(700+273.15)+8.314*(700+273.15)ln[(100/x)-1] = 0
    503043-272.043*(1500+273.15)+8.314*(1500+273.15)ln[(100/x)-1] = 0
    503043-272.043*(1100+273.15)+8.314*(1100+273.15)ln[(100/x)-1] = 0
    503043-272.043*(1200+273.15)+8.314*(1200+273.15)ln[(100/x)-1] = 0
    4/3x-6大于等于(6-5x)/3
    503043-272.043*(1300+273.15)+8.314*(1300+273.15)ln[(100/x)-1] = 0
    503043-272.043*(1000+273.15)+8.314*(1000+273.15)ln[(100/x)-1] = 0
    4/3x-6小于等于(6-5x)/3

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