/ 2 \
| / 36\ /4 \|
| |pi - ---| *|-- + pi*x||
| | 10| | 9 ||
|180 \ x / \x /|
2*|--- - -----------------------|
| 11 2 |
|x /4 \ |
| 1 + |-- + pi*x| |
| | 9 | |
\ \x / /
---------------------------------
2
/4 \
1 + |-- + pi*x|
| 9 |
\x /
$$\frac{2 \left(- \frac{\left(\pi - \frac{36}{x^{10}}\right)^{2} \left(\pi x + \frac{4}{x^{9}}\right)}{\left(\pi x + \frac{4}{x^{9}}\right)^{2} + 1} + \frac{180}{x^{11}}\right)}{\left(\pi x + \frac{4}{x^{9}}\right)^{2} + 1}$$
/ 3 3 2 \
| / 36\ / 36\ /4 \ / 36\ /4 \|
| |pi - ---| 4*|pi - ---| *|-- + pi*x| 1080*|pi - ---|*|-- + pi*x||
| | 10| | 10| | 9 | | 10| | 9 ||
| 1980 \ x / \ x / \x / \ x / \x /|
2*|- ---- - ---------------- + -------------------------- - ---------------------------|
| 12 2 2 / 2\ |
| x /4 \ / 2\ 11 | /4 \ | |
| 1 + |-- + pi*x| | /4 \ | x *|1 + |-- + pi*x| | |
| | 9 | |1 + |-- + pi*x| | | | 9 | | |
| \x / | | 9 | | \ \x / / |
\ \ \x / / /
----------------------------------------------------------------------------------------
2
/4 \
1 + |-- + pi*x|
| 9 |
\x /
$$\frac{2 \left(\frac{4 \left(\pi - \frac{36}{x^{10}}\right)^{3} \left(\pi x + \frac{4}{x^{9}}\right)^{2}}{\left(\left(\pi x + \frac{4}{x^{9}}\right)^{2} + 1\right)^{2}} - \frac{\left(\pi - \frac{36}{x^{10}}\right)^{3}}{\left(\pi x + \frac{4}{x^{9}}\right)^{2} + 1} - \frac{1080 \left(\pi - \frac{36}{x^{10}}\right) \left(\pi x + \frac{4}{x^{9}}\right)}{x^{11} \left(\left(\pi x + \frac{4}{x^{9}}\right)^{2} + 1\right)} - \frac{1980}{x^{12}}\right)}{\left(\pi x + \frac{4}{x^{9}}\right)^{2} + 1}$$