/ 2\ x*atan\3*x /
x*atan(3*x^2)
2 6*x / 2\ -------- + atan\3*x / 4 1 + 9*x
/ 4 \ | 36*x | 6*x*|3 - --------| | 4| \ 1 + 9*x / ------------------ 4 1 + 9*x
/ / 4 \\ | 4 | 72*x || | 12*x *|-5 + --------|| | 4 | 4|| | 36*x \ 1 + 9*x /| 18*|1 - -------- + ---------------------| | 4 4 | \ 1 + 9*x 1 + 9*x / ----------------------------------------- 4 1 + 9*x