/ 2 2/ 2\ / 2\ \
| 2 / 2\ 4*x *cos \x /*sin\x / / 2\|
2*|- 2*x *sin\x / - --------------------- + cos\x /|
| 2/ 2\ |
\ 1 + sin \x / /
----------------------------------------------------
2/ 2\
1 + sin \x /
$$\frac{1}{\sin^{2}{\left (x^{2} \right )} + 1} \left(- 4 x^{2} \sin{\left (x^{2} \right )} - \frac{8 x^{2} \sin{\left (x^{2} \right )} \cos^{2}{\left (x^{2} \right )}}{\sin^{2}{\left (x^{2} \right )} + 1} + 2 \cos{\left (x^{2} \right )}\right)$$
/ 2/ 2\ / 2\ 2 3/ 2\ 2 2/ 2\ / 2\ 2 3/ 2\ 2/ 2\\
| / 2\ 2 / 2\ 6*cos \x /*sin\x / 4*x *cos \x / 12*x *sin \x /*cos\x / 16*x *cos \x /*sin \x /|
4*x*|- 3*sin\x / - 2*x *cos\x / - ------------------ - ------------- + ---------------------- + -----------------------|
| 2/ 2\ 2/ 2\ 2/ 2\ 2 |
| 1 + sin \x / 1 + sin \x / 1 + sin \x / / 2/ 2\\ |
\ \1 + sin \x // /
------------------------------------------------------------------------------------------------------------------------
2/ 2\
1 + sin \x /
$$\frac{4 x}{\sin^{2}{\left (x^{2} \right )} + 1} \left(- 2 x^{2} \cos{\left (x^{2} \right )} + \frac{12 x^{2} \sin^{2}{\left (x^{2} \right )} \cos{\left (x^{2} \right )}}{\sin^{2}{\left (x^{2} \right )} + 1} - \frac{4 x^{2} \cos^{3}{\left (x^{2} \right )}}{\sin^{2}{\left (x^{2} \right )} + 1} + \frac{16 x^{2} \sin^{2}{\left (x^{2} \right )} \cos^{3}{\left (x^{2} \right )}}{\left(\sin^{2}{\left (x^{2} \right )} + 1\right)^{2}} - 3 \sin{\left (x^{2} \right )} - \frac{6 \sin{\left (x^{2} \right )} \cos^{2}{\left (x^{2} \right )}}{\sin^{2}{\left (x^{2} \right )} + 1}\right)$$