-16*acot(8*x)
-------------
2
1 + 64*x 128*(1 + 16*x*acot(8*x))
------------------------
2
/ 2\
\1 + 64*x / / 2 \
| 24*x 256*x *acot(8*x) |
2048*|- --------- - ---------------- + acot(8*x)|
| 2 2 |
\ 1 + 64*x 1 + 64*x /
-------------------------------------------------
2
/ 2\
\1 + 64*x /