2^x>x^2
    a^2-4a+4＞0
    （4-x）除以（2x+3）≥1
    （x+1）（x-5）（x-2）（x-5）<0
    a^2+16/9-8/3*a <20/9
    m+1<-m-1
    -3
    -3<-m-1
    -3<-m-1
    -3
    -3<-m-1<1
    -3<-m-1
    -m-1<1
    m+1<-m-1
    -3
    x^2>-x-6
    x^2>x+6
    x^2
    2x²-3x+4＜1
    x²-(2√5)x+√5＞0

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