/ 2\ acosh\1 + x /
2*x -------------------- ________________ / 2 / / 2\ \/ -1 + \1 + x /
/ 2 / 2\ \ | 2*x *\1 + x / | 2*|1 - --------------| | 2| | / 2\ | \ -1 + \1 + x / / ---------------------- ________________ / 2 / / 2\ \/ -1 + \1 + x /
/ 2\ | 2 / 2\ | | 2 6*x *\1 + x / | 4*x*|-3 - 5*x + --------------| | 2| | / 2\ | \ -1 + \1 + x / / -------------------------------- 3/2 / 2\ | / 2\ | \-1 + \1 + x / /