(((1+sinx)/((1-sinx)-1)/(2*sqrt((1+sinx)/((1-sinx)))>tanx
    (((1+sinx)/(1-sinx))-1)/(2*sqrt((1+sinx)/((1-sinx)-1))>tanx
    m*m+5*m+6>0 (m*m-m-6)/(m+3)<0
    18a<=2000
    160.9<=14.3*x(0.6-0.5x)
    3x+2<1
    （n-1000)^140/(n-1001)^140*(n-1)^150/n^150>=1
    (49.14x^2+1130.88x)/(147.42x+2261.76)*(24.57x^2+376.96x)-1.2*(6.25x^2+221.69x)/(37.5x+1330.14)*(12.5x^2+665.07x)-150.06x-1395.96>0
    1-3x>2
    (49.14x^2+1280.61x)/(147.42x+2561.22)*(24.57x^2+426.87x)-1.2*(6.25x^2+236.24x)/(37.5x+1417.44)*(12.5x^2+708.72x)+191.38x-656.003>0
    -1
    x^2+10x+25＞0
    3abs（2x-3）-1＜0
    x^2-5x-24＜0
    （x+2）^2＞0
    1/x≤1
    7x^2-6x-2√3+3<0
    -2/x<1-x
    -2/x<1-x>
    -2x＞4

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