x*acot(10*x)
10*x - ---------- + acot(10*x) 2 1 + 100*x
/ 2 \ | 100*x | 20*|-1 + ----------| | 2| \ 1 + 100*x / -------------------- 2 1 + 100*x
/ 2 \ | 100*x | 8000*x*|1 - ----------| | 2| \ 1 + 100*x / ----------------------- 2 / 2\ \1 + 100*x /