exp(x*log(1/(x - 1) + x/(x - 1)))
/ 1 x \ x*log|----- + -----| \x - 1 x - 1/ e
/ 1 x \ x*log|------ + ------| \-1 + x -1 + x/ e
exp(x*log(1/(-1 + x) + x/(-1 + x)))
/ /1 + x \\ / /1 + x \\ cosh|x*log|------|| + sinh|x*log|------|| \ \-1 + x// \ \-1 + x//
cosh(x*log((1 + x)/(-1 + x))) + sinh(x*log((1 + x)/(-1 + x)))
/ 1 x \ x*log|------ + ------| \-1 + x -1 + x/ e
exp(x*log(1/(-1 + x) + x/(-1 + x)))