/x\
2*asin|-|
\3/
---------------
________
/ 2
/ x
3* / 1 - --
\/ 9
$$\frac{2 \operatorname{asin}{\left(\frac{x}{3} \right)}}{3 \sqrt{1 - \frac{x^{2}}{9}}}$$
/x\
x*asin|-|
\3/
2*-----------
3/2
/ 2\
| x |
|1 - --|
2 \ 9 /
- ------- + -------------
2 27
-9 + x
$$\frac{2 \frac{x \operatorname{asin}{\left(\frac{x}{3} \right)}}{\left(1 - \frac{x^{2}}{9}\right)^{\frac{3}{2}}}}{27} - \frac{2}{x^{2} - 9}$$
/x\ 2 /x\
asin|-| x *asin|-|
\3/ \3/
2*----------- 2*-----------
3/2 5/2
/ 2\ / 2\
| x | | x |
|1 - --| |1 - --|
\ 9 / x \ 9 /
------------- + 6*---------- + -------------
27 2 81
/ 2\
\-9 + x /
$$\frac{2 \frac{x^{2} \operatorname{asin}{\left(\frac{x}{3} \right)}}{\left(1 - \frac{x^{2}}{9}\right)^{\frac{5}{2}}}}{81} + 6 \frac{x}{\left(x^{2} - 9\right)^{2}} + \frac{2 \frac{\operatorname{asin}{\left(\frac{x}{3} \right)}}{\left(1 - \frac{x^{2}}{9}\right)^{\frac{3}{2}}}}{27}$$