The first derivative
[src]
$$8 x \cos{\left(4 x^{2} \right)}$$
The second derivative
[src]
/ 2 / 2\ / 2\\
8*\- 8*x *sin\4*x / + cos\4*x //
$$8 \left(- 8 x^{2} \sin{\left(4 x^{2} \right)} + \cos{\left(4 x^{2} \right)}\right)$$
The third derivative
[src]
/ / 2\ 2 / 2\\
-64*x*\3*sin\4*x / + 8*x *cos\4*x //
$$- 64 x \left(8 x^{2} \cos{\left(4 x^{2} \right)} + 3 \sin{\left(4 x^{2} \right)}\right)$$