x^2-9.848*x=231.02
    x^2-17.271*x=626.45
    lgx=1.626
    110x-x×x=3016
    e^1ixpi/2
    e^1ix3
    (27-x)*6=(24-x)*9
    x+x*0.06=3800
    x+x*0.06
    （1＋sinx）÷（1－cosx）＝2/π
    （39.739+x）×0.85＝64.278+39.739－x
    （39.739+x）×0.85＝66.278+39.739－x
    （39.739+x）×0.85＝68.278+39.739－x
    （39.739+x）×0.85＝70.278+39.739－x
    （39.739+x）×0.85＝72.278+39.739－x
    (139+3x+96)/5＝x
    (139+4x)/5＝x+10
    (139+4x)/5＝x-10
    12x-60=x-9
    X^2+5.7*10^-10＝5.7*10^-11

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