Mathematics
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    x^2-4>0
    (2x²-2X+5)÷(x²-x+1)>0
    4x^2-4x+6>0
    -2x^2-4x+6<0
    x^2- 8x+ 12> 0
    x^2-5x+4> 0
    3x^2 <-2x
    x-5x+4>0
    3x^2<-2x
    3x2 <-2x
    x+sqrt(x)-12小于<0
    3*6*6-8*6-4a<0
    -x^2+130x-3000>1200
    -3x^2+36x>105
    0<36-3x<20
    (2(x+1))^2-4(x^2-1)>0
    (2(x+1))^2-4(x^2-1)<0
    12k-(k^2+k-6)^2<0
    12k-(k^2+k-6)<0
    -x^2+x≥0

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