log1/2(2x+3)
    log1/2(2x+3)
    2x^2-5x+3＜0
    (-1/2)^(4x)>(1/2)^(1-x)
    0.9^x<1/3
    (9x-1)^2>-5
    (2x+1)(x-3)≤0
    -2x＋ 3/5＞5x/2
    -2x＋（3/5）＞5x/2
    -2＋（3/5）＞5x/2
    （-x＋5）（x－3）＞0
    （-5x＋5）（x－3）＞0
    -3x²+8x-4＜0
    -2x^2+x+3>0
    4x^2-1>0
    2（3x-1)-4(5x-8)
    2（3x-1)-4（5x-8）小于x-4(x-2）
    x²-70x+600＞0
    x²-70x+600＞0
    4x^2-1>0

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