2 acot (8*x)
-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 /