2x+4≤3x+3
    1/2x＜3
    2x-1＞-x
    x+5＞4x+1
    3x-2＜x+1
    100-Y-Y×12%/4×2≥30
    3x＞ln10x
    lnx＞ln4x
    sqrt(x-1)>2
    (√x-1)>2
    16x^2-33x+17x≧0
    4-sqrt(x-1)≧4x
    3-2x＞1+2x
    （（2+x）/2）-（（x-1）/3）＜1
    （2+x/2）-（x-1/3）＜1
    (－m－1＋√m∧2＋2m－3)÷2≥0
    2（x+2）≤3x+3
    4（x-1）＜x+2 x+7/3＞x
    2x-1＞-x 1/2x＜3
    2x≤6-x 3x+1>2( x -1)

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