-x²+3x+10≧0
    x-1+1<2+1
    140≤(1+(0.5*0.5)/(1.13*x*1.13*x)*2)*120
    (3500Q*0.13-(5+150Q)-140)*0.12＞0
    （8-x）/（x-5）>1
    x>1,x+1/x+16/x^2+1
    4k^2-4(k-1)(k-3)>0
    (2k-1)^2-4(k^2-3k)>0
    2x+2/x+3≤1
    4-4(m-1)>0
    25-2x<12
    1600≥x+15×60≥190
    (0.35Q*0.13-(5+0.015Q)-140)≥0
    250000x^2-12000000x+829644000＜0
    -20x^2+500x+3000≥5000
    0.01x小于0.5x-100000小于0.05x
    1180-200x>440
    190≤x+14×60≤1600
    190≤x+15×60≤1600
    81 a^2+324 a- 1296≤0

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