x^2-5.6x+7.6=0
    x²-3.5x-10=0
    a×0.6=14.2
    a×0.6=64
    a×0.6=63.9
    a×0.6=71.9
    a×0.6=60.9
    a×0.6=60.6
    a×0.6=48.6
    a×0.6=35.9
    a×0.6=20.9
    a×0.6=13.2
    a×0.6=48.9
    a×0.6=34.9
    a×0.6=19.9
    a×0.6=12.9
    6.5=x/(x-12)
    (587+x)*0.75*1*1.55=8700/5
    -5e^x+5+e^xx=0
    6083700*（1-3.06%）-6062.23-3085150-（6083700/1.09*0.09-3085150/1.03*0.03-x/1.13*0.13）*1.12=x

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