72950.55276096+67966353.504*h+175896.36*h^2+313092.50112*h+972336.96*h+2516.4*h^3+335936.16*h^2+3477.6*h^3+9*h^4+300^2+600*h+h^2+(299.4)^2<0
    (0.001x^2 - 0.5487x + 81.074)< 0
    12n^2+24n-2006≤2019
    0.0005x^2 - 0.1903x + 20.97 - (0.001x^2 - 0.5487x + 81.074)< 0
    0.0005x^2 - 0.1903x + 20.97 - (0.0005x^2 - 0.1903x + 20.97)< 0
    0.0014x^2 - 0.7707x + 106.95 - (0.0005x^2 - 0.1903x + 20.97) < 0
    0.0025x2 - 1.3648x + 188.25 - (0.001x2 - 0.4028x + 41.329) < 0
    0.0019x2 - 0.9485x + 121.24 - (0.0009x2 - 0.3654x + 39.068) < 0
    0.0019x2 - 0.9544x + 121.53 - (0.0009x2 - 0.3829x + 45.325) < 0
    0.0024x^2 - 1.3426x + 186.29 - (0.2538x - 59.095) < 0
    -0.0021x^2 + 1.4222x - 190.78 - (0.0025x^2 - 1.1936x + 141.75) > 0
    (-4(0.466*300+h)-sqrt(16(0.466*300+h)^2+4((-300-0.6)^2+4(0.466*300+h)*(300+h))))/2>-300-h
    (-4(0.466*300+h)+sqrt(16(0.466*300+h)^2+4((-300+0.6)^2+4(0.466*300+h)*(300+h))))/2<-300-h
    (-4(0.466*300+h)-sqrt(16(0.466*300+h)^2+4((-300+0.6)^2+4(0.466*300+h)*(300+h))))/2≥-150*sqrt(3)
    (-4(0.466*300+h)-sqrt(16(0.466*300+h)^2+4((-300+0.6)^2+4(0.466*300+h)*(300+h))))/2>=-150*sqrt(3)
    (-4(0.466*300+h)-sqrt(16(0.466*300+h)^2+4((-300+0.6)^2+4(0.466*300+h)*(300+h))))/2>-150*sqrt(3)
    x^2-3*x+2>=0
    x^2+3*x+2>=0
    【x+1】>4
    abs(x+75/4/x-x/300-0.466*300.4)≤0.6

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