x^3-35*x^2+406*x-1560=0
    4*a^3+6*a^2+10*a+6=0
    y^2=2
    a^4+2*a^3+5*a^2+6*a+3=0
    ㏑x*e^x
    x+x*0.08=23
    x+x*0.8=23
    x+x*8=23
    4.1229=（（28.02*0.639（x+0.1））/（1+0.639（x+0.1））*（（100-6.66-1.14）/100）*（1/(1+0.31*1.14)）+（（0.76（x+0.1））/（1.3*0.101325））
    f^2-12f+32
    5a^2-48a+112
    5x^2-48x+112
    16a^2-8a-24
    120-（x+4）÷5=116
    0.01/(0.16*(x-0.03)^3)=31.25
    23.2%=105%+r+105%*r
    a*a=8
    23.2%=105%+r2+105%*r2
    3xx+16x+5=0
    2*xx-x-6=0

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