1/1-1.9926×（ln((1-1.9926)×(0.025-1.23*0.0086）÷(x-1.23*0.0086)))+1.9926=8.439
    X+(x*.13)=724500.00
    tancps0.6
    4x^3 + 72x^2 + 200x + 40 = 0
    x^2+0.00018x-0.000018=0
    x^2/(0.1-x)=0.00018
    ㏑(1+x/1)
    tanx＝0.75
    3x^2 + 6x + 2 = 0
    x-[(x-5000)*0.1-210]=12500
    x-[(x-5000)*0.1-210]=13000
    x-[(x-5000)*0.1-210]=16200
    x*x=9
    x-[(x-5000)*0.1-210]=10500
    x-[(x-5000)*0.1-210]=13500
    x-[(x-5000)*0.1-210]
    x^2+x^3=1
    1000x+1000x^2+5000x^3+5000x^4+5000x^5=11862.73
    9x+6=11(x-1)+1
    2（e∧2x）－1

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