10*x*acot(2*x)
(10*x)*acot(2*x)
20*x 10*acot(2*x) - -------- 2 1 + 4*x
/ 2 \ | 4*x | 40*|-1 + --------| | 2| \ 1 + 4*x / ------------------ 2 1 + 4*x
/ 2 \ | 16*x | 160*x*|4 - --------| | 2| \ 1 + 4*x / -------------------- 2 / 2\ \1 + 4*x /