(1-5x+25/3*x^2-125/8*x^3+625/24*x^4)^2 <1
    (1-x+1/3*x^2-1/8*x^3+1/24*x^4)^2<1
    (5729322.74+x）/(15711702.16+x)>0.6
    168-X-X*10%*3/4>＝30
    (5729322.74+x/(15711702.16+x)>0.6
    980a+99a^2-100-8000a^3＞0
    0>sqrt(-1)*x>-2
    x-25<20.356418+x
    0.99
    2x+1<3(5x+1)-4(2-3x)
    2(5x+4)<3(x-1)
    -2x-4
    -2x-4x
    3x^2 + 2x - 5 > 0
    3x + 5 > 2x - 2
    2x + 5 > 11
    （1÷D÷D）＋（3.2÷D÷D÷D）≤3500×π÷6
    -0.15×64+x×8+2.4>0
    2π(0.004x)^(1/2)＞1/5000
    x^2-4*x+3＜0

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