4*x
------------------------------
________
/ 4 / 2\ 2/ 2\
\/ 1 - x *acos\x /*acos \x /
$$\frac{4 x}{\sqrt{- x^{4} + 1} \operatorname{acos}{\left(x^{2} \right)} \operatorname{acos}^{2}{\left(x^{2} \right)}}$$
/ 4 2 \
| 1 2*x 6*x |
4*|----------- + ----------- - ------------------|
| ________ 3/2 / 4\ / 2\|
| / 4 / 4\ \-1 + x /*acos\x /|
\\/ 1 - x \1 - x / /
--------------------------------------------------
3/ 2\
acos \x /
$$\frac{4 \cdot \left(\frac{2 x^{4}}{\left(- x^{4} + 1\right)^{\frac{3}{2}}} - \frac{6 x^{2}}{\left(x^{4} - 1\right) \operatorname{acos}{\left(x^{2} \right)}} + \frac{1}{\sqrt{- x^{4} + 1}}\right)}{\operatorname{acos}^{3}{\left(x^{2} \right)}}$$
/ 2 6 4 2 \
| 9 5*x 6*x 18*x 24*x |
8*x*|- ------------------ + ----------- + ----------- + ------------------- + ---------------------|
| / 4\ / 2\ 3/2 5/2 2 3/2 |
| \-1 + x /*acos\x / / 4\ / 4\ / 4\ / 2\ / 4\ 2/ 2\|
\ \1 - x / \1 - x / \-1 + x / *acos\x / \1 - x / *acos \x //
----------------------------------------------------------------------------------------------------
3/ 2\
acos \x /
$$\frac{8 x \left(\frac{6 x^{6}}{\left(- x^{4} + 1\right)^{\frac{5}{2}}} + \frac{18 x^{4}}{\left(x^{4} - 1\right)^{2} \operatorname{acos}{\left(x^{2} \right)}} + \frac{5 x^{2}}{\left(- x^{4} + 1\right)^{\frac{3}{2}}} - \frac{9}{\left(x^{4} - 1\right) \operatorname{acos}{\left(x^{2} \right)}} + \frac{24 x^{2}}{\left(- x^{4} + 1\right)^{\frac{3}{2}} \operatorname{acos}^{2}{\left(x^{2} \right)}}\right)}{\operatorname{acos}^{3}{\left(x^{2} \right)}}$$