19.09x^3>1.25*2.17*(10+x)^2+0.9*1.25*(10+x)^3
    3m^2-14m-25>0
    m^2+m+14>0
    x＋8<7
    6-2x≥0 x-1/2-1<2x-4/3
    80n+120（20-n）≤2200
    80n+120（20-n）≤2200
    80n+120（20-n）≤2200
    x-lg(x)<0
    log(2,x)<0
    x-1<3
    34.2+2.85x-51.3+x<75.3
    2x^2-3√2x+1≥0
    2x^2-3x+1≥0
    2x^2-x+1≥0
    34.2+2.85x-51.3+x<75.3
    3x>3
    ((353.5 × 130)/(x²)) ≥ (3.05 + (0.024 × x))
    -30e^(x)-sinx+2<30
    -3.00001e^(x)-sinx+2<3.00001

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