-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%
    4－x²＜0
    -x^2+2x+1>0
    -t²＋t＋0.25≤0
    -x^2+x+2<=x/x^2+1
    -x^2+x<=x/x^2+1
    -x^2+x+1<=x/x^2+1
    x<18<2x
    2000-50n≥4.125√n
    3t^2-2t>14sqrt(3)-63
    3t^2-2t>14√3-63
    3t^2-2t>14√3-63
    0.9^x<1/3
    -x²-4x-8≥0

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