14*x
--------------
___________
/ 4
\/ 1 - 49*x
$$\frac{14 x}{\sqrt{- 49 x^{4} + 1}}$$
/ 4 \
| 98*x |
14*|1 + ---------|
| 4|
\ 1 - 49*x /
------------------
___________
/ 4
\/ 1 - 49*x $$\frac{\frac{1372 x^{4}}{- 49 x^{4} + 1} + 14}{\sqrt{- 49 x^{4} + 1}}$$
/ 4 \
3 | 294*x |
1372*x *|5 + ---------|
| 4|
\ 1 - 49*x /
-----------------------
3/2
/ 4\
\1 - 49*x / $$\frac{1372 x^{3} \left(\frac{294 x^{4}}{- 49 x^{4} + 1} + 5\right)}{\left(- 49 x^{4} + 1\right)^{\frac{3}{2}}}$$