2x-3<4x-1
    2x-1>x+1
    x-1>x+1/2
    x-1小于等于x+1/2
    x-1小于等于x+1÷2
    absx>=1
    absx>=x
    abs(x)>=x
    X>=X
    a＋b>4 ab<4
    10^x≥1
    e
    a(a-1)>384
    2x+1>1
    y*7÷6=175000
    y*7÷6=100000
    y*7÷6=10000
    y*7÷6=175546
    x*7÷6=175546
    x7÷6=175546

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