/ -x\ asin\E /
-x -e -------------- ___________ / -2*x \/ 1 - e
/ -2*x \ | e | -x |1 + ---------|*e | -2*x| \ 1 - e / ------------------- ___________ / -2*x \/ 1 - e
/ -4*x -2*x \ | 3*e 4*e | -x -|1 + ------------ + ---------|*e | 2 -2*x| | / -2*x\ 1 - e | \ \1 - e / / ------------------------------------ ___________ / -2*x \/ 1 - e