1
------ + cos(y)
2
1 + y
$$\cos{\left (y \right )} + \frac{1}{y^{2} + 1}$$
/ 2*y \
-|--------- + sin(y)|
| 2 |
|/ 2\ |
\\1 + y / /
$$- \frac{2 y}{\left(y^{2} + 1\right)^{2}} + \sin{\left (y \right )}$$
2
2 8*y
-cos(y) - --------- + ---------
2 3
/ 2\ / 2\
\1 + y / \1 + y /
$$\frac{8 y^{2}}{\left(y^{2} + 1\right)^{3}} - \cos{\left (y \right )} - \frac{2}{\left(y^{2} + 1\right)^{2}}$$