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    -xx+60x-1600=0
    x^2=x√x+2
    -xx+20x-1600=0
    (2+1/9-X*X)/(sqrt(2)/3)= (sqrt(2))/2
    (35-2x)(20-2x)=496
    (2*k+1)*(2*k+1)-2*(4*k-3)*(4*k-3)=31
    x=e∧(-0.565)
    x/(1-x)^2=1.8*10^9
    2x^3-6x^2+5x-1=0
    (25-10)*x/[(25-10)*x- 1500-2700]=1
    (25-10)*x/[(25-10)*x- 1500-2700]
    100 000×(P-1.2)- 40 000=0
    20(1+x)(1+x)-20(1+x)=4.8
    (1/x)²
    (587.4-X)*(50/60)=192
    x-cosx=0
    x(3500-84x)=10025
    x^2+【(24-x)×(40-x)】×2=520
    3^2x×5=60
    1920-128x+3x^2=520

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