x^2=2^x
    1/7.848＝x∧2×（1+（x*0.1）∧2）∧（1/2）
    sgnXsgnX
    3427.39=22.4*2070x*(1920-x/2)
    3427.39=22.4*2070x(1920-x/20
    (40-X)^0.75=0.343(X-33.5)
    2x=5
    x=4
    13-2x=7.5-x
    -ln(1-x)/x = 1.5
    【（x-200）*（1-25%）】/3300= 【（x-200-150）*（1-25%）】/3000
    （x-1100）÷2200=（x-1400）÷1200
    5.8x-3.3+10=20
    5.8x-33+10=20
    （x-1160）÷1700=（x-1400）÷1200
    （x-1160）÷1700=（x-1400）÷1200
    （x-1100）/2200=（x-1160）/1700
    2^x=x+3
    2^x=x+3
    1598.5+1598.5*0.05+0.05*X+(1598.5+1598.5*0.05+0.05*X)*0.0475*2/2+(1598.5+1598.5*0.05+0.05*X+(1598.5+1598.5*0.05+0.05*X)*0.0475*2/2)*0.31+0.0524*X=x

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