/x\ x
- acos|-| + ---------------
\2/ ________
/ 2
/ x
2* / 1 - --
\/ 4
$$\frac{x}{2 \sqrt{1 - \frac{x^{2}}{4}}} - \operatorname{acos}{\left(\frac{x}{2} \right)}$$
2
x
1 + ----------
/ 2\
| x |
8*|1 - --|
\ 4 /
--------------
________
/ 2
/ x
/ 1 - --
\/ 4
$$\frac{\frac{x^{2}}{8 \left(1 - \frac{x^{2}}{4}\right)} + 1}{\sqrt{1 - \frac{x^{2}}{4}}}$$
/ 2 \
| 3*x |
x*|16 + ------|
| 2|
| x |
| 1 - --|
\ 4 /
---------------
3/2
/ 2\
| x |
32*|1 - --|
\ 4 /
$$\frac{x \left(\frac{3 x^{2}}{1 - \frac{x^{2}}{4}} + 16\right)}{32 \left(1 - \frac{x^{2}}{4}\right)^{\frac{3}{2}}}$$