Mathematics
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    2x-x^2-3>0
    C(200,x)+0.02^x=0.98(200-x)<0.01
    2x+1>x^2+x-1
    M×M-3<2M+45
    5(5x+2)+2>=37
    x-(x-1)/3>1
    3(x+2)>=4(x+1)
    (3x-2)/5>(2x+1)/3-1
    50+0.4x≤0.6x
    -0.2x≤-50
    50+0.95(x-50)>100+0.9(x-100)
    (2x+1)/3-(1-x)/4>1/3
    40(400+x)-5(400+x)≥20000
    4x(x-3)>0
    2x^2+5/2x+3≤ 0
    2x^2+5/2x+3>0
    sin x >0.5
    sinx>1
     -xx-11 >0
    xx+11>0

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