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