/ 2 2 2 \
2 | 12 acos (3*x) 36*x*acos(3*x) 27*x *acos (3*x)|
-3645*acos (3*x)*|------------- + ------------- - -------------- + ----------------|
| 3/2 3/2 2 5/2 |
|/ 2\ / 2\ / 2\ / 2\ |
\\1 - 9*x / \1 - 9*x / \-1 + 9*x / \1 - 9*x / /
$$- 3645 \left(\frac{27 x^{2} \operatorname{acos}^{2}{\left(3 x \right)}}{\left(1 - 9 x^{2}\right)^{\frac{5}{2}}} - \frac{36 x \operatorname{acos}{\left(3 x \right)}}{\left(9 x^{2} - 1\right)^{2}} + \frac{\operatorname{acos}^{2}{\left(3 x \right)}}{\left(1 - 9 x^{2}\right)^{\frac{3}{2}}} + \frac{12}{\left(1 - 9 x^{2}\right)^{\frac{3}{2}}}\right) \operatorname{acos}^{2}{\left(3 x \right)}$$