3x+4 ≤x+6
    x+7/3≤x+3
    2X-140＝2628900
    （2x+1）（3x+2）大于12
    5*(2*x-1)>4*(3*x-2) (x-1)/4<(1-2*x)/5
    abs(2*x-3)≥x+1
    200X+170(30-X)<=5700
    200X+170(30-X)<5700
    210Y+250(30-Y)<5700
    250X+210(30-X)<5700
    3x-12
    4x+4<=7x+10
    298590000≤360×A×（312+445.86×sin(0.785)）
    0.326≤0.6667×sin(3.14×A)+A×(1-sin（6.28×A）÷(6.28×A)）×0.875+4
    312650000≤360×A×（312+445.86×sin(0.785)）
    0.446≤0.6667×sin(3.14×A)+A×(1-sin（6.28×A）÷(6.28×A）)×0.875+4
    15-9x≤10-4x
    0.342≤0.6667×sin(3.14×A)+A×[1-(sin（6.28×A）÷(6.28×A）)]×0.875+4
    5x+6>4x
    0.342≤0.6667×sin(3.14×A)+A×(1-sin（6.28×A）÷（6.28×A)）×0.875+4

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