2x-1/4＜-25/4
    2x-1/4＜-（25/4）
    -0.3x≥1.8
    -3x≤-1/3
    -3x≤-（1/3）
    （-1/2）x＜2
    -1/2x＜2
    （1/3）x＜-3
    (1-X)*0.0118901+0.0018576X≤0.0020383
    5×(n-1)^2×(255.033+32.988n)+5296+1047n≥5086+1324.2+6×n^2×(178.545+11.279n)
    [(544.1n^2+6829.489n+20278.439)(n-1)^2]/(477.078+98.964n)≥11.3n-211.5+1.2n^2(10626.106+1678.264n+63.6n^2)/(357.09+33.837n)
    n^2-296.36n+138.39+(114993.17n^2+19084.26n^3+760.5n^4)/(1176.15+117n)>(36405.68n^2+2698.92n^3+48.02n^4)/(660.96+29.4n)
    3x≤9
    300y+9000-450y≤8000
    6-6X-16＞7X-17
    300*x+450*(20-x)≤8000
    3609.52x^5+176460.36x^4+2277484.96x^3+6248187.67x^2-22890656.74x+180185410.1>0
    12*2000*x-8000x+3*4500*(8-x)-(8-x)5000>100000
    4-3x<3x-2
    4x-15>2x-3

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