21 / 2 \
- -------------- + x*\2*x + x*x/ + x*x*x
/ 2\
| 49*x |
20*|1 + -----|
\ 4 /
$$x x x + x \left(2 x^{2} + x x\right) - \frac{21}{20 \left(\frac{49 x^{2}}{4} + 1\right)}$$
/ 343 \
6*x*|2*x + --------------|
| 2|
| / 2\ |
\ 5*\4 + 49*x / /
$$6 x \left(2 x + \frac{343}{5 \left(49 x^{2} + 4\right)^{2}}\right)$$
/ 2 \
| 343 67228*x |
6*|4*x + -------------- - --------------|
| 2 3|
| / 2\ / 2\ |
\ 5*\4 + 49*x / 5*\4 + 49*x / /
$$6 \left(- \frac{67228 x^{2}}{5 \left(49 x^{2} + 4\right)^{3}} + 4 x + \frac{343}{5 \left(49 x^{2} + 4\right)^{2}}\right)$$