((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
    100x/28<2x+16
    x^2<5x+12<100x/28<2x+16
    x㏑x-(2x-5/2)e^(1-x)＞0
    （2x+2）e^x-4＞0
    5x + x^2 > 100
    5x + x² > 100
    x>0

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