x>2
    14-4x*x大于等于x
    x小于0，x+1除以4x-2
    14/5≤t≤28/5 t≤74/25 t≥34/25
    (64/5-3t)/2≤3+t
    (64/5-3t)/2≥-1+t
    ((5-t)+(-9+4t))/2≤3+t
    ((5+x)+(-9+4x))/2≥-1+x
    abs（5x）-3≥0
    5X-3≥0
    -2≤m+1
    x
    abs(x-3)-abs(x+1)<=4
    -0.1<（1+2x）^0.25-1-0.5x<0.1
    （x+2）（x-3）＞0
    （x+2）（x-3）＞0
    2x
    2x
    2x
    x+150<5x/3

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