x＞2x
    1-0.5a-2.5＞a-1
    x/ln((x+5474.3)-3.8)<28571
    x2大于等于36
    0.9x+40 > 0.95x+15
    10x-5(16-x)≥100
    (5x+2)(2-4x)(2-3x)<0
    256x^2-628x-128<0
    256x^4-628x^2-128<0
    2(2x-1)＜5（x+1）
    4x+2.5（60-x）≤198 1.5x+3.5（60-x）≤150
    X+6>5
    2(x-3)-3(x-2)<0
    x/2-x/3>1
    300*0.8y+200[30*1+(20-1)*1-y]<=10800
    45a+60（4+3-a）≥385
    300*(0.8y)+200[30*1+(20-1)*1*2*y]<=10800
    300*(0.8y)+200[30*1+(20-1)*1*2*y]<=10800
    0.5x-1<7-3/2x
    3-2x>x+2

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