(26.293+x)×2.85＝26.293+71.278-x
    (26.293+x)×2.65＝26.293+71.278-x
    (26.293+x)×2.45＝26.293+71.278-x
    xlnx+1
    197.4+（25－x）*4.32＝（50+216+6.48x）/1.5
    7X∧2+7+18X＝0
    x=180-64.79-6.4-45
    t=90-18.81-6.4
    15X∧2+32X+15＝0
    sin(t)=sin(t-6.4)*1.5
    x=1120*0.0001/3.1415926535*180
    sin(x)=sin(x-6)*1.5
    sin(x)=sin(x-6)*1.5
    （6-x）（10-x）＝3／5×4x×4x
    60-16 x+x^2减3/5×16 x^2=0
    13-11x=7699
    x^7-1=0
    x*x*x*x*x*x*x+x*x*x*x*x+x*x*x*x+x*x*x+x*x+x+1=0
    x*x*x*x*x*x*x=1
    x*x*x*x*x=1

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