x²+6x<0
    （-x＋2）（2x－1）＞0
    e^x-0.2/x^2>0
    e^x-2/x^2>0
    e^x+2/x^2>0
    e^x+(1/x^3)>0
    x^3-3x^2-9x-5>0
    -40+x-20*12%/4-x*12%/4 ≥30
    X-1564150-0.025X≥300000
    X-1564150-0.1X/4≥300000
    X-1564150-X*0.1/4≥300000
    -1564150+X-X*10%/4≥300000
    -4114150+3000000-450000+X-X*10%/4≥300000
    -4114150+3000000-450000+X-X*10%/4≥300000
     -4114150+3000000+X-450000-X*10%/4300000≥300000
     -4114150+3000000-450000+X-X*10%≥4300000
    1>x*50*0.02%
    1≤x*50*0.02%
    1<=x*50*0.02%
    1>x*50*0.02%

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