x∧2-x-1＝0
    x∧2-x+1＝0
    x2-x-1＝0
    x（x+6）＝9
    x（x-6）＝9
    8100（x+26）=9900x
    4x-3（40-x）=62
    x^2*sin1/x
    （(2093+289+185-121-136-104-X-6140)/6140)*0.5=((1845+X)-3716)/3716
    （(2093+289+185+67-X-6140)/6140)*0.5=((1845+X)-3716)/3716
    x^3-6*x^2-87*x-160
    63*x*x-140x+60=0
    0.5s^2+1.5s+1
    3270=V+0.0305V+577+17.31+130.8+0.0319V+11.15+172.98+87.01
    [（X-180）*(1-0.25)]/1610=[(X-170)*(1-0.25）-258.8]/1210
    （X-126.400）*10-1-1=2
    100*x*222.64/(x*222.64+(1-x)*0.5*335.17)=92.419
    100*x*222.64/(x*222.64+(1-x)*0.5*335.17)=90.016
    x∧2－x＝－9/16
    6x-35=13

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