x(3x-1)(1-x)>0
    1-2a＜3-a
    1≤3-a≤5
    1≤1-2a≤5
    1.32*x1-x1-x2-x3>=0 6*x2-x1-x2-x3>=0 4.3*x3-x1-x2-x3>=0
    x^2+8x+12<0
    (a^3*(a - 4))^(1/2)/2 - (a*(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 + (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

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