3
-12*x
--------
8
1 + 9*x $$- \frac{12 x^{3}}{9 x^{8} + 1}$$
/ 8 \
2 | 24*x |
36*x *|-1 + --------|
| 8|
\ 1 + 9*x /
---------------------
8
1 + 9*x $$\frac{36 x^{2}}{9 x^{8} + 1} \left(\frac{24 x^{8}}{9 x^{8} + 1} - 1\right)$$
/ 16 8 \
| 1728*x 156*x |
72*x*|-1 - ----------- + --------|
| 2 8|
| / 8\ 1 + 9*x |
\ \1 + 9*x / /
----------------------------------
8
1 + 9*x $$\frac{72 x}{9 x^{8} + 1} \left(- \frac{1728 x^{16}}{\left(9 x^{8} + 1\right)^{2}} + \frac{156 x^{8}}{9 x^{8} + 1} - 1\right)$$