/ 2 \ | 2 21*acot(x) 21*x*acot (x)| -2*|------ + ---------- + -------------| | 9/5 2 2 | |5*x / 2\ / 2\ | \ \1 + x / \1 + x / /
/ 2 2 2 \ | 7 6 7*acot (x) 28*x *acot (x) 42*x*acot(x)| 6*|--------- + -------- - ---------- + -------------- + ------------| | 3 14/5 2 3 3 | |/ 2\ 25*x / 2\ / 2\ / 2\ | \\1 + x / \1 + x / \1 + x / \1 + x / /