x^2-2x>=0
    4x^2+{x+2}^2<1
    5x^2+4x+3<0
    t ^ 2 * ln (t^2) <3 * ( t ^ 2 - 1 )
    t ^ 2 * ln t^2 <3 * ( t ^ 2 - 1 )
    2*t^2*lnt<3*(t^2-1)
    t^2*lnt
    t*lnt<3*(t-1)
    18
    -36a^(2)+48a+112a≥0
    2x+3≥x+4 （2x+5）/3-2<2-x
    2x+3≥x+4 2x+5/3-2<2-x
    4x^2-12x+9=0
    k^2-8(1-2k)≥0
    -x^2+6x-10≥0
    -x^(2)＋6x-9>0
    (e(-0.607x)-e(-0.6677x))/(2.15108-e(-0.607x))<0.01
    (e(-0.427x)-e(-0.4697x))/(1.8171-e(-0.427x))<0.01
    (e(-0.557x)-e(-0.6127x))/(2.1328125-e(-0.557x))<0.01
    (e(-0.413x)-e(-0.4543x))/(1.8159-e(-0.413x))<0.01

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