-1 ---------- 2 18*log (2) e
exp(-1/(18*log(2)^2))
0.890803325846364
/ 1 \ / 1 \ - sinh|----------| + cosh|----------| | 2 | | 2 | \18*log (2)/ \18*log (2)/
-sinh(1/(18*log(2)^2)) + cosh(1/(18*log(2)^2))