(x+542)*0.165/68+311/(x+542)≤1.25
    log(2,a)<2a
    （x-1)(2x+1)大于0
    10^（（n-17）/2）＞10^（n-6）-10^（-3）
    50×（1+8％）（50－m）+80×0.9m≤3060
    0<-4x^2+25x-36
    -4x^2<-18x+14
    0<3x^2+8x+4
    -20x^2<-57x+27
    26x+56<10x^2
    x-2<-6x^2
    -13x<-20x^2+72
    -56<-6x^2-10x
    -3x-56<-20x^2
    -19x-42<2x^2
    -22x-8<5x^2
    -8<-3x^2+23x
    15x^2-22x<48
    8x^2+38x+35<0
    -5x^2+6<-29x

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