2*x
acos(x)*2 - ----------- + 2*b*cos(2*x)
________
/ 2
\/ 1 - x
$$2 b \cos{\left(2 x \right)} - \frac{2 x}{\sqrt{1 - x^{2}}} + 2 \operatorname{acos}{\left(x \right)}$$
/ 2 \
| 2 x |
-2*|----------- + ----------- + 2*b*sin(2*x)|
| ________ 3/2 |
| / 2 / 2\ |
\\/ 1 - x \1 - x / /
$$- 2 \left(2 b \sin{\left(2 x \right)} + \frac{x^{2}}{\left(1 - x^{2}\right)^{\frac{3}{2}}} + \frac{2}{\sqrt{1 - x^{2}}}\right)$$
/ 3 \
| 3*x 4*x |
-2*|----------- + 4*b*cos(2*x) + -----------|
| 5/2 3/2|
|/ 2\ / 2\ |
\\1 - x / \1 - x / /
$$- 2 \left(4 b \cos{\left(2 x \right)} + \frac{3 x^{3}}{\left(1 - x^{2}\right)^{\frac{5}{2}}} + \frac{4 x}{\left(1 - x^{2}\right)^{\frac{3}{2}}}\right)$$