(a^3*(a - 4))^(1/2)/2 - (a*(a^3*(a - 4))^(1/2))/2 + (3*a^2)/2 - a^3/2>-1
    (a*(a^3*(a - 4))^(1/2))/2 - (a^3*(a - 4))^(1/2)/2 + (3*a^2)/2 - a^3/2>-1
    (a(a^3(a - 4))^(1/2))/2 - (a^3(a - 4))^(1/2)/2 + (3a^2)/2 - a^3/2<1
    (a*(a^3*(a - 4))^(1/2))/2 - (a^3*(a - 4))^(1/2)/2 + (3*a^2)/2 - a^3/2<1
    (a^3(a - 4))^(1/2)/2 - (a(a^3(a - 4))^(1/2))/2 + (3a^2)/2 - a^3/2<1
    2a+a^2-a^3<1
    2a^2-a^3+a<1
    log（0.5，x＾2+2x-3）
    278(x-3)+351(6-2x)-463(3-x)>0
    9x²+6x+1＜1/4
    9x²+6x=1＜1/4
    2x+1<0 2x2+1>0 1-x>0 2x2+1<0 1-x<0
    x²-x+¼≤0
    10x-2>8
    x＋8＞16
    0.2y≥500
    0.19y≤500
    （3x+4)(3x-4)<9(x-2)(x+3)
    3^x>5x
    a²-1＞1

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