6h<-60
    -8>5+v/3
    -4b>-20
    -4b>20
    4b>-20
    4b>20
    23+102.5x <23.23+84.65x
    22+103.5x<22.29+87x
    8.4r+48<6.2r+84
    3x-5<16
    inx+1大于1
    (x+1)/3<=2x-(x-1)/2
    3(x-2)+8>6
    999999999999999999999999999999999999999999999999999999999999999999999＞x
    -4x^2+sqrt2x+3<0
    -4x^2+sqrt2x+3<=0
    -7a^2+20a+4 <0
    -7a^2+20a+4<0
    （x*1.095）-（x*4%）-（x+x4%*5%）<=800
    23+112.5x<26+94x

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