4 3*x 3 -------- + 4*x *atan(3*x) 2 1 + 9*x
/ 3 \ 2 | 9*x 4*x | 6*x *|2*atan(3*x) - ----------- + --------| | 2 2| | / 2\ 1 + 9*x | \ \1 + 9*x / /
/ / 2 \\ | 3 | 36*x || | 9*x *|-1 + --------|| | 3 | 2|| | 108*x 18*x \ 1 + 9*x /| 6*x*|4*atan(3*x) - ----------- + -------- + --------------------| | 2 2 2 | | / 2\ 1 + 9*x / 2\ | \ \1 + 9*x / \1 + 9*x / /