2 49 / 2 \
-1 - cot (x - 7) + -- - \2 + 2*tan (x)/*tan(x)
2
x
$$- \left(2 \tan^{2}{\left(x \right)} + 2\right) \tan{\left(x \right)} - \cot^{2}{\left(x - 7 \right)} - 1 + \frac{49}{x^{2}}$$
/ 2 \
| / 2 \ 49 / 2 \ 2 / 2 \|
2*|- \1 + tan (x)/ - -- + \1 + cot (-7 + x)/*cot(-7 + x) - 2*tan (x)*\1 + tan (x)/|
| 3 |
\ x /
$$2 \left(- \left(\tan^{2}{\left(x \right)} + 1\right)^{2} - 2 \left(\tan^{2}{\left(x \right)} + 1\right) \tan^{2}{\left(x \right)} + \left(\cot^{2}{\left(x - 7 \right)} + 1\right) \cot{\left(x - 7 \right)} - \frac{49}{x^{3}}\right)$$
/ 2 2 \
| / 2 \ 147 / 2 \ 3 / 2 \ 2 / 2 \|
2*|- \1 + cot (-7 + x)/ + --- - 8*\1 + tan (x)/ *tan(x) - 4*tan (x)*\1 + tan (x)/ - 2*cot (-7 + x)*\1 + cot (-7 + x)/|
| 4 |
\ x /
$$2 \left(- 8 \left(\tan^{2}{\left(x \right)} + 1\right)^{2} \tan{\left(x \right)} - 4 \left(\tan^{2}{\left(x \right)} + 1\right) \tan^{3}{\left(x \right)} - \left(\cot^{2}{\left(x - 7 \right)} + 1\right)^{2} - 2 \left(\cot^{2}{\left(x - 7 \right)} + 1\right) \cot^{2}{\left(x - 7 \right)} + \frac{147}{x^{4}}\right)$$