-15000+X+X*8%/4 >= 4500
    -15000+X+X*8%/4>=4500
    139.8a^2-10a-16 <0
    8000<=1400x-10x*x-40000
    95a^2-10a-16<0
    （-7x+16)/3>0
    （-x+16)/3>0
    （5x-11)/3>0
    4*k*k+22 > 0.29*k+0.6*k*k+0.427333333
    3（x+3）-6＞4（2x-3）
    3（2x-1）+1≥x+3
    10（2x-1/4)-125(9/5-3x)<2(x-3/8)
    (2x-0.25)/0.25<2
    1+1<=x
    28x^2-32x^3+20x-17>0
    16x^2-14x-1<0
    0.99^n≤0.01
    a>2
    x*0.25 ≥10+（x-10）*0.25
    x*0.25≤10+（x-10）*0.25

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