x e x ------ + atan(x)*e 2 1 + x
/ 2 2*x \ x |------ - --------- + atan(x)|*e | 2 2 | |1 + x / 2\ | \ \1 + x / /
/ / 2 \ \ | | 4*x | | | 2*|-1 + ------| | | | 2| | | 3 6*x \ 1 + x / | x |------ - --------- + --------------- + atan(x)|*e | 2 2 2 | |1 + x / 2\ / 2\ | \ \1 + x / \1 + x / /