Find the general solution $(e^x+e^{-x})\;dy-(e^x-e^{-x})\;dx=0$

Question

$\begin{array}{1 1} y = \log(e^x + e^{-x}) + C \\ y = \log(e^x - e^{-x}) + C \\ y = \large\frac{x}{\log(e^x )} + C\\y = 1 - \log(e^x + e^{-x}) + C \end{array} $