x-(54000x-200)/(200000-x/1200)>0
    45x-1/6+(40000000-x/6)/(x-(54000x-200)/(200000-x/1200))>0
    45x-1/6+(40000000-x/6)/(x-(54000x-200)/(200000x-x/1200))>0
    x2+x3+x4>=4 x1+x2+x3+x4+x5<=10 6*x1+6*x2-4*x3-4*x4+36*x5<=0 4*x1+10*x2-x3-2*x4-3*x5<=0
    (x-10)*x＜=-34
    (x^2-2）（x^2+1）≥0
    3x+1≦136
    2.159=＜0.285+0.005x＞x∧1.5
     4 { x }^{ 4 } + { x }^{ 3 } -3 { x }^{ 2 } -2x+1 > 0
    4x-64大于0
    a＾2-2a≤9
    1>x*x-4x>0
    1>x/(4-x)>0
    x/(4-x)>0
    4m＾2-4m-8<0
    2m＾2-2m-1<0
    m＾2-m-8<0
    0.0002/0.0002+x＜0.0004
    0.0002/0.0002+x＜40
    sqrt(9.8*((6+2*b)/(6+b)))≤0.8

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