5201314>x^x^x^x^x^x^x^x^x>1314520
    1314520>x^x^x^x^x^x^x^x^x>5201314
    1314>x^x^x^x^x^x^x^x^x>520
    1314>x^x>520
    520>x^x>1314
    2x≤8 4x-1>x＋2
    x
    8x^2-8x+1≤0
    3x+3<4x－1
    2（x＋1）
    5x－2（x－2）≥10
    1-x/2
    2-4x>2x-1
    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

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