x^3-61x^2+510x-9=0
    (3x-12)/(5-x)=0
    lnx=11.46
    2^x-2^-x
    10000000=658*（x*√（x^2+10）*√（x^2+100））
    x^6+110x^4+1000x^2=100000^2
    x^2cos（x+π/4）
    sinx^2
    X-X*0.065-(X+327746)*0.0003=327746
    X-X*0.065-(X-327746)*0.0003=327746
    720t-1200/800=t-3
    X-X*0.065-(X+423773.6)*0.0003=423773.6
    X-X*0.065-(X+423773.6)=423773.6
    x-x*0.065-(x+192000.3）*0.0003=192000.3
    x-x*0.065-(x+231834.7）*0.0003=231834.7
    x-x*0.065-(x+231834.7）*0.0003=231834.7
    x-x*0.065-(x+231834.7）*0.0003=231834.7
    2x + 5 = 13
    x^3+0.5*x^2-x-1
    ｛（220+260）*43-x｝*0.9+32*43=17823.5

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