x²-9>0
    x^4+x>=0
    5.076*10^(-8)x^4+20x>=18000+1522.8*10^-8
    5.076*10^(-8)x^4+20x>=6012+1522.8*10^-8
    v^2 + 9v - 7110 > 0
    log1/2(2x+3)>log1/8(5x-6)^3
    log1/2(2x+3)
    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

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