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    (5√2/2)²+(2m-1)(5√2/2)+m²+3=0
    1/3x²-2x+2=4
    (x-2)×13+4=x×15-2
    (x-2)×13-4=x×15+2
    (3X+39)+(3X+50)+25=3X-26
    (3x-39)+(3x-50)+25=3x+26
    5t^2+4t-0.8=0
    e^x-x^e=0
    (√z^3-√z)^2=2
    (√z^3+√z)^2=2
    z^2=-1
    1-2/x+1/x²=0
    x²-2×(x+2)-4=0
    2(x+5+19.2)=50+222-2x
    x²+2×(x+2)-4=0
    12x^2-54x+45=0
    20/x-5=10/x
    20/x-5=20/2x
    20/x+5=20/0.5x
    20/x+5=20/2x

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