58440.46218((1+i)^5)=1100((1-((1+i)/12)^(-60))/(i/12) )
    58440.46218(1+i)^5=1100(1-((1+i)/12)^(-60))/(i/12)
    4xxx+6xx+2=0
    -74435-91.715*（950+273.15）+8.314*（950+273.15）ln(([(1/5)-1]^4)*x^1 )= 0
    -74435-91.715*（950+273.15）+8.314*（950+273.15）ln(([(1/0.05)-1]^4)*x^1 )= 0
    3*x*x+22*x+10=0
    1.8*sin(90*x)=0.0548*x
    1300（1+x^(2)）＝2925
    -74435-91.715*（700+273.15）+8.314*（700+273.15）ln(([(100/x)-1]^4)*1^1 )= 0
    -74435-91.715*（800+273.15）+8.314*（800+273.15）ln(([(100/x)-1]^4)*1^1 )= 0
    -74435-91.715*（900+273.15）+8.314*（900+273.15）ln(([(100/x)-1]^4)*1^1 )= 0
    -74435-91.715*（1000+273.15）+8.314*（1000+273.15）ln(([(100/x)-1]^4)*1^1 )= 0
    -74435-91.715*（1100+273.15）+8.314*（1100+273.15）ln(([(100/x)-1]^4)*1^1 )= 0
    -74435-91.715*（1200+273.15）+8.314*（1200+273.15）ln(([(100/x)-1]^4)*1^1 )= 0
    -74435-91.715*（1200+273.15）+8.314*（1300+273.15）ln(([(100/x)-1]^4)*1^1 )= 0
    2x^3+3x^2-12x-40=0
    -74435-91.715*（1300+273.15）+8.314*（1300+273.15）ln(([(100/x)-1]^4)*1^1 )= 0
    2x^3+3x^2-12x-13=0
    （0.50-x）*（0.045-x）/（0.050+X）/（0.040+X）=0.517
    10.85384x^(2)-1=0

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