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