x(77-4x+3)=440
    x(77-4x+3)=300
    (1+x)(1+x)=1.44
    xx-4x-5=0
    6m-9=m(2m-3)
    xx-4x+5=0
    x(x-16)=161
    x*x+2x-2024=0
    9x²=(9-9/5x)²+(12-27/5x)²
    x^2+12x-55=0
    2x^3-x^2-1=0
    x^2+3x-0.3744=0
    x^2-21x+108=0
    4x^2-24x+35=0
    X^2-49 x+299
    X^2-49 x+293
    x²+x-96=0
    1200+30x+1200/x=3200
    2.5x^2+30x-12=0
    1-q^10/1-q^5=33

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