2+x／3＞2x－1／5－2
    -3/5(x-5/2)>2+15/64=-3/5(x+5/3)>2+15/9
    -5/3(x-2/5)>2+64/15=-5/3(x+3/5)>2+9/15
    -5x>15
    lg（x2+2x-2）＞0
    D(1-D)^2<0.14816
    x-9/2<0 4-2x<0
    x-6<2x (x+2)/5>=(x-1)/4
    2x+1>=x 1/3x-1/4<(3x-1)/12
    (3x-1)/2-1<2x x-3(2x-1)>=8
    x+3>=2 (x-1)/2-x>-2
    (x+4)/3>1
    -2x+5>=3
    4x-2>3x
    4-2x<0
    x-9/2<0
    1/3*x-1<=4-3/4*x
     x-1<3x+3
    (x/0.7)-((0.17-2x)/0.03)>1
    1-2x<0.3(1-x)

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