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    x^2-9.2x+12.2=0
    5.1033=((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))
    2x = 5x
    5x^2+250x+100000=0
    X*(8.8-X)=19
    (x-200)*145*145/(x*200)=71.214
    a^2-4a=0
    (x+3)*(x+7)
    228/125a=288/5
    y=log0.4
    7x^2+6x-9=0
    240=240*(0.1+0.6+0.06)*(1+a%)
    X=0 Y=206 W=850 H=1
    2x+3(62-x)=150
    5x-15*5=2x
    8(x-1)^3=27
    0.5((3-x)^2)=8
    0.5(3-x)^2=8
    (3x-1)+(5-2x)=0
    x*0.8+(1650-x)*0.21=1650*0.35

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