The third derivative
[src]
/ 2 \
___ | 3*x |
\/ x *|-1 + -------|
___ | 2|
3*\/ x 3 3*acos(x) \ -1 + x /
- ------------- + ------------------ + --------- + --------------------
3/2 ________ 5/2 3/2
/ 2\ 3/2 / 2 8*x / 2\
2*\1 - x / 4*x *\/ 1 - x \1 - x /
$$\frac{\sqrt{x} \left(\frac{3 x^{2}}{x^{2} - 1} - 1\right)}{\left(1 - x^{2}\right)^{\frac{3}{2}}} - \frac{3 \sqrt{x}}{2 \left(1 - x^{2}\right)^{\frac{3}{2}}} + \frac{3}{4 x^{\frac{3}{2}} \sqrt{1 - x^{2}}} + \frac{3 \operatorname{acos}{\left(x \right)}}{8 x^{\frac{5}{2}}}$$