114.67/(2×h×tan30+1.4)+15×h≤200
    17.325*h^2-210h-165.33≤0
    1.7325*h^2-228.9*h-165.33≤0
    114.67/(2×h×tan30+1.4 )+15×h≤200
    3^x>5x
    abs(x-3)+abs(x+4)≥9
    x^2－4≥0 4－x^2≥0
    x^2－2x≥0
    (1-0.3) ^x<0.2
    t^2+2t+1≥11/6
    1-x>4 3X-4<3
    1-x>4
    （1+x）^3<0
    （1+x）^3<0
    abs(2x-1)
    a²-6a-3＜0
    x²/x²-x+1≥0
    t^2－2t+2≥0
    -24X^2-51X-31＜0
    (1-0.3) ^x<0.2

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