/ 2 2 2 \
| 2 asin (7*x) 42*x*asin(7*x) 147*x *asin (7*x)|
1029*|-------------- + -------------- + -------------- + -----------------|
| 3/2 3/2 2 5/2 |
|/ 2\ / 2\ / 2\ / 2\ |
\\1 - 49*x / \1 - 49*x / \-1 + 49*x / \1 - 49*x / /
$$1029 \left(\frac{147 x^{2} \operatorname{asin}^{2}{\left(7 x \right)}}{\left(1 - 49 x^{2}\right)^{\frac{5}{2}}} + \frac{42 x \operatorname{asin}{\left(7 x \right)}}{\left(49 x^{2} - 1\right)^{2}} + \frac{\operatorname{asin}^{2}{\left(7 x \right)}}{\left(1 - 49 x^{2}\right)^{\frac{3}{2}}} + \frac{2}{\left(1 - 49 x^{2}\right)^{\frac{3}{2}}}\right)$$