/ / 4\ 4 8 / 4\\
2 | 3*acos\x / 8*x 4*x *acos\x /| / 4\
-12*x *|----------- + ------- + -------------|*acos\x /
| ________ 8 3/2 |
| / 8 -1 + x / 8\ |
\\/ 1 - x \1 - x / /
$$- 12 x^{2} \left(\frac{4 x^{8} \operatorname{acos}{\left(x^{4} \right)}}{\left(1 - x^{8}\right)^{\frac{3}{2}}} + \frac{8 x^{4}}{x^{8} - 1} + \frac{3 \operatorname{acos}{\left(x^{4} \right)}}{\sqrt{1 - x^{8}}}\right) \operatorname{acos}{\left(x^{4} \right)}$$
/ 8 2/ 4\ 4 / 4\ 8 2/ 4\ 16 2/ 4\ 12 / 4\\
| 16*x 3*acos \x / 36*x *acos\x / 26*x *acos \x / 24*x *acos \x / 48*x *acos\x /|
24*x*|- ----------- - ----------- - -------------- - --------------- - ---------------- + ---------------|
| 3/2 ________ 8 3/2 5/2 2 |
| / 8\ / 8 -1 + x / 8\ / 8\ / 8\ |
\ \1 - x / \/ 1 - x \1 - x / \1 - x / \-1 + x / /
$$24 x \left(- \frac{24 x^{16} \operatorname{acos}^{2}{\left(x^{4} \right)}}{\left(1 - x^{8}\right)^{\frac{5}{2}}} + \frac{48 x^{12} \operatorname{acos}{\left(x^{4} \right)}}{\left(x^{8} - 1\right)^{2}} - \frac{26 x^{8} \operatorname{acos}^{2}{\left(x^{4} \right)}}{\left(1 - x^{8}\right)^{\frac{3}{2}}} - \frac{16 x^{8}}{\left(1 - x^{8}\right)^{\frac{3}{2}}} - \frac{36 x^{4} \operatorname{acos}{\left(x^{4} \right)}}{x^{8} - 1} - \frac{3 \operatorname{acos}^{2}{\left(x^{4} \right)}}{\sqrt{1 - x^{8}}}\right)$$