3
----------------
________
2 / 9
x * / 1 - --
/ 2
\/ x
$$\frac{3}{x^{2} \sqrt{1 - \frac{9}{x^{2}}}}$$
/ 9 \
-3*|2 + -----------|
| 2 / 9 \|
| x *|1 - --||
| | 2||
\ \ x //
--------------------
________
3 / 9
x * / 1 - --
/ 2
\/ x
$$- \frac{3 \cdot \left(2 + \frac{9}{x^{2} \cdot \left(1 - \frac{9}{x^{2}}\right)}\right)}{x^{3} \sqrt{1 - \frac{9}{x^{2}}}}$$
/ 21 81 \
9*|2 + ----------- + ------------|
| 2 / 9 \ 2|
| x *|1 - --| 4 / 9 \ |
| | 2| x *|1 - --| |
| \ x / | 2| |
\ \ x / /
----------------------------------
________
4 / 9
x * / 1 - --
/ 2
\/ x
$$\frac{9 \cdot \left(2 + \frac{21}{x^{2} \cdot \left(1 - \frac{9}{x^{2}}\right)} + \frac{81}{x^{4} \left(1 - \frac{9}{x^{2}}\right)^{2}}\right)}{x^{4} \sqrt{1 - \frac{9}{x^{2}}}}$$