8(x+8)-8(8x-8)<8x
    8(x+8)-8(8x+8)<8x
    8(x-8)+8(8x+8)<8x
    8(x-8)-8(8x+8)<8x
    2(x-2)-2(2x+2)<2x
    67.5（20-x）-500（2/3）x>0
    40.5*（20-x）-500（2/3）x>0
    abs（2x-1）≤3x+2
    N^6-(2*2-8)*N^5+(2^2+7*2+67/2)*N^4+(6*(2^2)-37/2*2-287/4)*N^3+(5*(2^2)-211/4*2+595/16)*N^2-(12*(2^2)-337/4*2+1793/16)*N+(4*(2^2)-55/2*2 +5053/64)>0
    N^6-(2*1-8)*N^5+(1^2+7*1+67/2)*N^4+(6*(1^2)-37/2*1-287/4)*N^3+(5*(1^2)-211/4*1+595/16)*N^2-(12 * (1^2) -337/4*1+1793/16)*N+(4*(1^2)-55/2*1 +5053/64)>0
    N^6-(2*0-8)*N^5+(0^2+7*0+67/2)*N^4+(6*(0^2)-37/2*0-287/4)*N^3+(5*(0^2)-211/4*0+595/16)*N^2-(12 * (0^2) -337/4*0+1793/16)*N+(4*(0^2)-55/2*0 +5053/64)>0
    (x-2）(x+3)(x+4)(x-1)＞0
    X^6>0
    3x²－12x＋12＞0
    3x²－12x＋12＜0
    x²＋6x＋10＞0
    3x²-6x＋2＞0
    3x²-6x＋2＜0
    x^3-3x+4>0
    3x²－5x＋1≤0

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