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    z∧3-1.5z∧2-0.25z+0.4=0
    x²-1834x+683280=0
    5cos(2x)+3=0
    abs(x)=x+1
    20(1-x)^2=14. 45
    2x+1.5x=17.5
    20-x×(400+50x)=9750
    16X+24X×(1+25%)(X+4)=960
    2-x=2(2-2x)
    ln-(1-x^2)=ln2
    -ln(1-x^2)=ln2
    e^(-sqrt(1-x^2))=0.2
    e^sqrt(1-x^2)=0.2
    (3x+2)^5
    2X/0.3-(1.6-3X)/0.6=(31X+8)/2
    2X÷0.3-(1.6-3X)÷0..6=(31X+8)÷2
    2X/0.3-1.6-3X/0.6=31X+8/2
    2X/0.3-1.6-3X/0.6=31X+8/2
    2X/0.3-1.6-3X/0.6=31X+8/2
    2X/0.3-1.6-3X/0.6=31X+8/2

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