x+x*0.1=1134
    2x＾2+13859x+53800=0
    tanx＝2x
    tanx＝3x
    5＾x-3^x=16
    lnx=x-2
    50x^25+50x^24+50x^23+50x^22+50x^21 =880.339
    3x^2+10x-25
    50x^10+50x^9+50x^8+50x^7+50x^6 =314.541
    z＾4＝-4
    （5x-1）＾3
    5x＝2
    x^3-(x-0.2)^2=0
    x^3-x+0.2=0
    x*x-x+0.2=0
    c(6,3)
    e(x^2-x)=x
    5x^3=2.58
    40+3/4 x=2 x
    x+x^(-1)=3

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