acos(2*x) -2*e ------------- __________ / 2 \/ 1 - 4*x
/ 1 2*x \ acos(2*x) -4*|--------- + -------------|*e | 2 3/2| |-1 + 4*x / 2\ | \ \1 - 4*x / /
/ 2 \ | 1 6*x 3*x | acos(2*x) 16*|- ------------- - ------------- + ------------|*e | 3/2 5/2 2| | / 2\ / 2\ / 2\ | \ \1 - 4*x / \1 - 4*x / \-1 + 4*x / /