/ 2/ 2\\
2*pi*x*\1 + tan \pi*x //
$$2 \pi x \left(\tan^{2}{\left (\pi x^{2} \right )} + 1\right)$$
/ 2/ 2\\ / 2 / 2\\
2*pi*\1 + tan \pi*x //*\1 + 4*pi*x *tan\pi*x //
$$2 \pi \left(4 \pi x^{2} \tan{\left (\pi x^{2} \right )} + 1\right) \left(\tan^{2}{\left (\pi x^{2} \right )} + 1\right)$$
2 / 2/ 2\\ / / 2\ 2 / 2/ 2\\ 2 2/ 2\\
8*x*pi *\1 + tan \pi*x //*\3*tan\pi*x / + 2*pi*x *\1 + tan \pi*x // + 4*pi*x *tan \pi*x //
$$8 \pi^{2} x \left(\tan^{2}{\left (\pi x^{2} \right )} + 1\right) \left(2 \pi x^{2} \left(\tan^{2}{\left (\pi x^{2} \right )} + 1\right) + 4 \pi x^{2} \tan^{2}{\left (\pi x^{2} \right )} + 3 \tan{\left (\pi x^{2} \right )}\right)$$