/ 2 2 2 2 \
| 2 6 9*log(1 - atan(3*x)) 2*log (1 - atan(3*x)) 72*x *log (1 - atan(3*x)) 54*x*log(1 - atan(3*x)) 18*x*log (1 - atan(3*x)) |
108*|- 2*log (1 - atan(3*x)) + ---------------------------- - ---------------------------- + ---------------------------- + ------------------------- - --------------------------- + ---------------------------|*log(1 - atan(3*x))
| / 2\ 2 / 2\ 2 / 2\ 2 2 / 2\ / 2\ |
\ \1 + 9*x /*(-1 + atan(3*x)) \1 + 9*x /*(-1 + atan(3*x)) \1 + 9*x /*(-1 + atan(3*x)) 1 + 9*x \1 + 9*x /*(-1 + atan(3*x)) \1 + 9*x /*(-1 + atan(3*x))/
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2
/ 2\
\1 + 9*x / *(-1 + atan(3*x))