(1234567^12345678901234567890)%999999997
    (x－50)(50＋5(100－x))
    1.125*[0.25x/(0.25x+100)]=1.7x/(x+100)
    1.125*{0.25x/(0.25x+100)}=1.7x/(x+100)
    {0.25x/(0.25x+100)}=1.7x/(x+100)
    0.175x^2+143.75x=112
    x^2+x=112
    －4082750＋3000000－450000＋A－A×10%/4≥300000
    (38023-x)÷x=-0.9628
    (38023-x)/x=-0.9628
    (38023-x)/ x=-0.9628
    (38023-x)/ x=-0.9628*100%
    0.9*0.3*(0.52*1249.46/1860-0.26)* 1249.46
    1395-54.13-76.91-14.50
    (2-1)/(2*2)*5.82*9.96
    (2-1)/(2*2)*5.82*9.963691
    2108.285*1000/649036.798+2108.285*1000*794.0^2/197925113037.83
    2108.285/649036.798+2108.285*794.0^2/197925113037.83
    (1395-54.13-76.91)*1668
    8/x=3

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