2
x
----------
/ 6\
| x |
2*|1 + --|
\ 36/
$$\frac{x^{2}}{2 \left(\frac{x^{6}}{36} + 1\right)}$$
/ 6 \
| 3*x |
36*x*|1 - -------|
| 6|
\ 36 + x /
------------------
6
36 + x
$$\frac{36 x \left(- \frac{3 x^{6}}{x^{6} + 36} + 1\right)}{x^{6} + 36}$$
/ 6 12 \
| 27*x 36*x |
36*|1 - ------- + ----------|
| 6 2|
| 36 + x / 6\ |
\ \36 + x / /
-----------------------------
6
36 + x
$$\frac{36 \cdot \left(\frac{36 x^{12}}{\left(x^{6} + 36\right)^{2}} - \frac{27 x^{6}}{x^{6} + 36} + 1\right)}{x^{6} + 36}$$