1 2
-9 - ------ - 9*cot (t) + 3*sin(t) + 3*t*cos(t)
2
1 + t
$$3 t \cos{\left(t \right)} + 3 \sin{\left(t \right)} - 9 \cot^{2}{\left(t \right)} - 9 - \frac{1}{t^{2} + 1}$$
2*t / 2 \
6*cos(t) - 3*t*sin(t) + --------- + 18*\1 + cot (t)/*cot(t)
2
/ 2\
\1 + t /
$$- 3 t \sin{\left(t \right)} + \frac{2 t}{\left(t^{2} + 1\right)^{2}} + 18 \left(\cot^{2}{\left(t \right)} + 1\right) \cot{\left(t \right)} + 6 \cos{\left(t \right)}$$
2 2
/ 2 \ 2 2 / 2 \ 8*t
- 18*\1 + cot (t)/ - 9*sin(t) + --------- - 36*cot (t)*\1 + cot (t)/ - --------- - 3*t*cos(t)
2 3
/ 2\ / 2\
\1 + t / \1 + t /
$$- \frac{8 t^{2}}{\left(t^{2} + 1\right)^{3}} - 3 t \cos{\left(t \right)} - 18 \left(\cot^{2}{\left(t \right)} + 1\right)^{2} - 36 \left(\cot^{2}{\left(t \right)} + 1\right) \cot^{2}{\left(t \right)} - 9 \sin{\left(t \right)} + \frac{2}{\left(t^{2} + 1\right)^{2}}$$