e^x-x
    e^x-x> e ^(-1) + 1
    -X ^2+6X-9＞0
    e^x -x
    x3+x2+x+1小于0
    -4114150+3000000+x-450000-x*10％/4≥300000
    7-5X≥15-7x
    -(2a+1)＞0
    (x∧2+2x-3)/(x∧2+x+2020)＜0
    (2a+1)^2-8＞0
    x²＋7x＋12＞0
    X-1/3≥2x+5/2+1
    2x-2-6 x+15/6≥1
    -2x²-1＜x
    -2x²-1＜x
    X-550-（5+10+X*0.06/12）≥50
    X-550-（5+10+X*0.06/12）≥50
    X-550-（5+10+X*0.06/12）≥50
    （x-1）2大于等于4
    300/500（15-X）≤0.075

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