x*ln(x)-(x-1)*ln(x-1)=ln2
    X-X*0.065=1395725.64
    X-X*0.065-(X+6558905.64)*0.0003=6558905.64
    X-X*0.65-(X+6558905.64)*0.0003=6558905.64
    exp（1/x）
    x/x+1
    sinx=0.294
    (x+367)/(x+367+130)-0.78=0
    （26.813+x）×0.85＝53.627+70.24-x
    （26.813+x）×0.85＝53.627+71.24-x
    （26.813+x）×0.85＝53.627+72.24-x
    （26.813+x）×0.85＝53.627+73.24-x
    （26.813+x）×0.85＝53.627+74.24-x
    x/(x+527)-0.78=0
    x(x+527)=0.78
    a²+48a-64
    700(1+x)²=1008
    （16-x）(160+40x）=3640
    （38-22-x）（160+x/3×120）=3640
    sin(2x+π/6)+1/2

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