x^2-11.4X+32.2=0
    a×0.6=32.9
    a×0.6=26.9
    a×0.6=46.9
    a×0.6=19.9
    a×0.6=11.9
    6^x=x^18
    (x-0.1958）（x-0.2066）(x-0.2066)=1.9*10^-68
    x+1=3
    -90-45-26.5+57.3x=-180
    X-X/1.01*0.011-X/1.01*0.8*0.2=3500*12
    X-X/1.01*0.01-X/1.01*0.8*0.2=3500*12
    X-X/1.01*0.01-X/1.01*0.8*02=3500*12
    98.3*(1-r^11)/(1-r)-98.3=3513.548
    98.3*(1-r^11)/(1-r)-98.3=6586.416
    3x^2-27x+10=0
    a×0.6=10.9
    8x/0.4=2.5
    12/7-x=0
    (x-4)^(1/3)

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