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