5m+24(10+m)<200
    n^(2)+n-60≥0
    0.8[8x+6(50-x)]<400
    x*2^(x-1000000-1)+x^4*2^(x-2000000-2)<2*(x-1)-1
    16k^2-4*2*2(k+1)>0
    (12.5*x*x/(4-x*x)-3*x*x+2)/(25*x/(4-x*x)-5*x)>(25*x*x*x*x/(4*(4-x*x)*(4-x*x))+(22*x*x+3*x*x/4+4)/(4-x*x)+2.5*x)/((-10*x*(1-5/(4-x*x)))/(4-x*x))
    (12.5*x*x/(4-x*x)-3*x*x+2)/(25*x/(4-x*x)-5*x)>(((3/8)*x*x*x/(4-x*x))+2.5*x/(4-x*x)+x*x/4-9*x/40+0.25+2/5x)/(5/(4-x*x)-1)
    m ^2＋1.76m－3.0976=0
    1+x>2x
    (x+2)^2(x-1)^3(x+1)(x-2)<0
    x^3+3x^2>2x+6
    (x+2)(x-1)<0
    (x-1)<0
    (x+2)<0
    x^2+x-2<0
    400/x=400/1.25x+1
    abs（2x+1）
    abs（2x+1）=1
    (4*x^2+4*x-4)^2-4*x^2*(4*x^2+4*x+1)>0
    (2x-1)(5-x)<0

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