100x+6x^2=-5sqrt2x
    x-(x*0.08)=2373.6
    1.2*x+0.5*(-9.8)*1.2^2=8
    0.5*(-9.8)*x^2=8
    21%=x+(x-7.81%)*1.025
    2X^2+X-2
    x^3+x^2-x-3=0
    100/x=(1+100x)*(1+0.0025x)
    x^3+x^2-x-x=0
    sin(x)-cos(x)+1/2=0
    2500xx=4096x+576xxx-1791-252xx
    3^x=109/59
    2500xx=4096x+576xxx-1792-252xx
    2500xx=4096x+576xxx
    sin(120-x)=2sinx
    48x^(2)+123x+5＝0
    x^(2)-65x+540=0
    (4-3^0.5)x^2+x=6
    10.98x^3+28.56x^2-247.53x-3430.31=0
    x2+3x+5=100

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