3
--------------
2
1 + (3*x - 1)
$$\frac{3}{\left(3 x - 1\right)^{2} + 1}$$
-18*(-1 + 3*x)
------------------
2
/ 2\
\1 + (-1 + 3*x) /
$$- \frac{54 x - 18}{\left(\left(3 x - 1\right)^{2} + 1\right)^{2}}$$
/ 2 \
| 4*(-1 + 3*x) |
54*|-1 + ---------------|
| 2|
\ 1 + (-1 + 3*x) /
-------------------------
2
/ 2\
\1 + (-1 + 3*x) /
$$\frac{\frac{216 \left(3 x - 1\right)^{2}}{\left(3 x - 1\right)^{2} + 1} - 54}{\left(\left(3 x - 1\right)^{2} + 1\right)^{2}}$$