ln（1/（1-x））+x=0.098244799999328432
    ln（1/（1-x））+x=0.00075506694043065
    2x^3-1=0
    a*a(1+a*a)(1+0.04a*a)=100
    8x^4-2+4x^3-4x=0
    a*a(1+a*a)(1+0.04a*a）=1
    aa(1+aa)(1+0.04aa）=1
    A+A*A=32
    arctan0.1wc+arctan0.2wc＝20
    b^4+4b^3+2b^2-4b-2=0
    （x-0.966）*1000-0.1=2
    （x-0.966）*1000-0.1=3
    （x-1.358）*200-0.1=5
    （x-1.358）*200-0.1=4
    x^（9/x）=3
    x^（1/x）=3
    0.0001x^6+0.0201x^4+1.02x^2-99=0
    2x+5x(30-x)=99
    x*0.48+x=840
    x/(1000+x)=10%

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