8594666÷9²＋0.518x²×6.4332－864²
    (0.1293+y)*y=0.0000537(0.0293-y)
    x^2+0.1537x-0.00537=0
    (12645527.48+x-17663416.3)/17663416.3*60%+(x+3049942.52-9595584.96)/9595584.96*40%=8%
     x^2-4000x+60000000
    (20565783.29+x-31235851.39）/31235851.39*60%+(4861245.89+x-15704537.4)/15704537.4*4%=7%
    x*x*x*x*x*x+2*x*x*x*x*x+x*x*x*x-4*x*x*x+x*x+2*x-1=0
    60x-x^2/1000-20x-60000=0
    x*x*x*x*x*x+2*x*x*x*x*x+x*x*x*x-4*x*x*x+x*x+2*x-1=0
    60000-x-60000000-20000x=0
     x^2-12000x+1000000
    x^2-12000x+1000000=0
    e^(-1/x^(2))
    3x^2-2x-1
    lnx=1/3
    lnx=1/7
    （x+1）cosx＝1
    10^x=0.2
    10^b=2
    10^x=2

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