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    x²=√x+1
    x^2+4x-1=0
    2x^2-3x+1/2=0
    3x^2+2x+1=0
    x^3-3x+1=0
    25%=(x-169)/169*100%
    25=(x-169)/x*100%
    2=100×(x-262.5)/(x×1350/100)
    x(x+1)
    2=100×(x-263)/(x×1350/100)
    -2x^2+120x-1600=150
    X∧5+10X∧3+20X-4
    X5+10X3+20X-4
    lnx-1/x
    -4 = -x^2-2x+3
    4=-x^2-2x+3 -4=-x^2-2x+3
    2(x-1)-3(x+1)=-6
    5(2x-1)=2(1+2x)+x-2
    5(2x-1)=2(1+2x)+x-2
    10x²+18x+6=0

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