abs(1-100*x+5000*x^2-1000000/6*x^3+100000000/24*x^4)<1
     25x2-10x+1>0
    （x²＋x）＞（x+3）²
    （x-1）*（-3x-2)＞-1
    （3x-2）*（x-1）＜1
    3x²-5x+2＜1
    x^3-3x-2＞0
    x²+2x+1＜0
    1+2*a^3-3*a^2>0
    4×20×1000÷3.14÷x^2+32×8×1000÷3.14÷x^3≤40×1000000
    1/x+1≤1
    2x+cosx＞0
    2x^2-5x+3＜0
    2x^2-5x+3＜0
    200（5x+1-x/3）≥3000
     -1/m-[1/(m^2)-(2/m)+6]^(1/2)>0
     -1/m+[1/(m^2)-(2/m)+6]^(1/2)>0
     {-1/m+[1/(m^2)-(2/m)+6]^(1/2)}^2-8>0
     {-1/m-[1/(m^2)-2/m+6]^(1/2)}^2-8>0
     {-1/m+[1/(m^2)-2/m+6]^(1/2)}^2-8>0

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