1+lnx1+lny\frac{1+\ln x}{1+\ln y}1+lny1+lnx
−1+lnx1+lny-\frac{1+\ln x}{1+\ln y}−1+lny1+lnx
1−lnx1+lny\frac{1-\ln x}{1+\ln y}1+lny1−lnx
1+lnx1−lny\frac{1+\ln x}{1-\ln y}1−lny1+lnx