Mathematics
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    x²+3x²+5x+4=0
    x^3-x^2-3x/2+1/2=0
    x^2/(0.05-x)=1.6x10^-7
    x^2-4.5x+5=0
    188.6+127.4*x=77*(x+3.7)
    353.6+127.4*x=77*(x+3.7)
    x^2-5x=10
    16^x=8x
    x*x-10.4x+11.8=0
    x^2-10.4x+11.8=0
    (56+X)÷(80+X)=0.7
    10lgX=-9
    10lgX=3
    2.5=X/(1-X)
    2.5=X*(1-X)
    x²+x
    1/1+x²
    250176.4/8.314/298=lnk
    lnk=-250176.4/(8.314*298)
    lnk=-(-210.9*10^(3)-131.8*298)/8.314*298

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