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    1.25*x^2-10*x-55=0
    x*x+x=210
    x*(x+1)=210
    -x^2+54x-720=0
    k*lg(k)/lg(2)*sqrt(k)=10^(11)
    t²-4t-6=0
    16(y-1/4)^4+16(y-1/4)^3-4(y-1/4)^2-4(y-1/4)+1
    16(y-1/4)^4+16(y-1/4)^3-4(y-1/4)^2-4(y-1/4)+1
    16(y-1/4)^4+16(y-1/4)^3-4(y-1/4)^2-4(y-1/4)+1
    16(y-1/4)^4+16(y-1/4)^3-4(y-1/4)^2-4(y-1/4)+1
    16(y-1/4)^4+16(y-1/4)^3-4(y-1/4)^2-4(y-1/4)+1=0
    16(y-1/4)^4+16(y-1/4)^3-4(y-1/4)^2-4(y-1/4)+1=
    16(y-1/4)^4+16(y-1/4)^3-4(y-1/4)^2-4(y-1/4)+1=0
    x^2-500x+600=0
    -(x^2) /200+2.5x=3
    X^2=-1
    X^3+X^2+X=0
    X^3+X^2+X+1=0
    4X^3+3X^2+2X+1=0
    X^3+2X^2+3X+4=0

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