3
-28*x
---------
8
1 + 49*x $$- \frac{28 x^{3}}{49 x^{8} + 1}$$
/ 8 \
2 | 392*x |
28*x *|-3 + ---------|
| 8|
\ 1 + 49*x /
----------------------
8
1 + 49*x $$\frac{28 x^{2}}{49 x^{8} + 1} \left(\frac{392 x^{8}}{49 x^{8} + 1} - 3\right)$$
/ 16 8 \
| 153664*x 2548*x |
56*x*|-3 - ------------ + ---------|
| 2 8|
| / 8\ 1 + 49*x |
\ \1 + 49*x / /
------------------------------------
8
1 + 49*x $$\frac{56 x}{49 x^{8} + 1} \left(- \frac{153664 x^{16}}{\left(49 x^{8} + 1\right)^{2}} + \frac{2548 x^{8}}{49 x^{8} + 1} - 3\right)$$