Mathematics
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    25x>30
    2/(h-0.5)>2.5
    (1977.51+852.57*x+225.005*x^2+11.5*x^3)/(2440.4+593.68*x+14.32*x^2+23/18*x^3) >1.2
    (1977.51+852.57*x+225.005*x^2+11.5*x^3)/(2440.4+593.68*x+14.32*x^2+23/18*x^3) >1
    (1977.51+852.57*x+225.005*x^2+11.5*x^3)/(2440.4+593.68*x+14.32*x^2+23/18*x^3) >1.15
    (1977.51+852.57*x+225.005*x^2+11.5*x^3)/(2440.4+593.68*x+14.32*x^2+23/18*x^3)>1.2
    200*0.61+200*0.66+0.92*(x-400)<=300
    sin(x)<1.000001
    sin(x)<=1
    a^2 + a - 2 < 0
    lg(3/4)/lgx < 1
    2 * (x^2) - 3 * x + 1 < x ^ 2 + 2 * x - 5
    3*(1+a/4)+8<2*(9-a/4)
    (-3x+6)(x*x+1)>8-3x*x
    3X≥14.4/11
    2.5-0.25k>0 2.5-1.25k-0.125k^2>0
    2.5-1.25k-0.125k^2>0
    2.72x>1.5 3.38(1-x)>1.5
    2.72x>1.5 3.38(1-x)>1.5
    x^4<=4

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