/ 2 \
| 6 3 / 3\ 6 / 3\ |
| 9*x 18*x *\1 + x / 36*x *\1 + x / |
6*|1 - ------------- - -------------- + ----------------|
| 2 2 2|
| / 3\ / 3\ / 2\ |
| 1 + \1 + x / 1 + \1 + x / | / 3\ | |
\ \1 + \1 + x / / /
---------------------------------------------------------
2
/ 3\
1 + \1 + x / $$\frac{1}{\left(x^{3} + 1\right)^{2} + 1} \left(\frac{216 x^{6} \left(x^{3} + 1\right)^{2}}{\left(\left(x^{3} + 1\right)^{2} + 1\right)^{2}} - \frac{54 x^{6}}{\left(x^{3} + 1\right)^{2} + 1} - \frac{108 x^{3} \left(x^{3} + 1\right)}{\left(x^{3} + 1\right)^{2} + 1} + 6\right)$$