Mathematics
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    x²/x-1
    a^2-1.3×a+0.45=0
    X÷(X-12)=3
    2.94x²+2.617x-2.1=0
    192=-x^2+28x
    tanx-x=0.349
    9(X-2)=4(X+1)
    x^(1/2)
    -x+0.49x=-164.4
    (18-X)(10X+100)=1920
    sinx
    -7.89x^3+13.991x^2-9.468x+1.98828
    1/xcos1/x
    ex/x
    1.39x=0.00002
    y=-(13/4)^2-121/16
    y=-(-3+13/4)^2-121/16
    4-4x-(lnx)(lnx)(lnx)=0
    1-4x-(lnx)(lnx)(lnx)=0
    3=-(-2-m/2)^2+12-m^2/4

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