/ /x\\ / /x\\
|acos|-|| |acos|-||
| \8/| | \8/|
-7*cos|-------|*sin|-------|
\ 2 / \ 2 /
----------------------------
________
/ 2
/ x
8* / 1 - --
\/ 64
$$- \frac{7 \sin{\left(\frac{\operatorname{acos}{\left(\frac{x}{8} \right)}}{2} \right)} \cos{\left(\frac{\operatorname{acos}{\left(\frac{x}{8} \right)}}{2} \right)}}{8 \sqrt{1 - \frac{x^{2}}{64}}}$$
/ / /x\\ / /x\\ / /x\\ / /x\\\
| |acos|-|| |acos|-|| |acos|-|| |acos|-|||
| 2| \8/| 2| \8/| | \8/| | \8/||
| 256*cos |-------| 256*sin |-------| x*cos|-------|*sin|-------||
| \ 2 / \ 2 / \ 2 / \ 2 /|
7*|- ----------------- + ----------------- - ---------------------------|
| 2 2 3/2 |
| -64 + x -64 + x / 2\ |
| | x | |
| |1 - --| |
\ \ 64/ /
-------------------------------------------------------------------------
512
$$\frac{7 \left(- \frac{x \sin{\left(\frac{\operatorname{acos}{\left(\frac{x}{8} \right)}}{2} \right)} \cos{\left(\frac{\operatorname{acos}{\left(\frac{x}{8} \right)}}{2} \right)}}{\left(1 - \frac{x^{2}}{64}\right)^{\frac{3}{2}}} + \frac{256 \sin^{2}{\left(\frac{\operatorname{acos}{\left(\frac{x}{8} \right)}}{2} \right)}}{x^{2} - 64} - \frac{256 \cos^{2}{\left(\frac{\operatorname{acos}{\left(\frac{x}{8} \right)}}{2} \right)}}{x^{2} - 64}\right)}{512}$$
/ / /x\\ / /x\\ / /x\\ / /x\\\
| |acos|-|| |acos|-|| |acos|-|| |acos|-|||
| 2| \8/| 2| \8/| | \8/| | \8/||
| 16384*cos |-------| 16384*sin |-------| x*cos|-------|*sin|-------||
| \ 2 / \ 2 / \ 2 / \ 2 /|
-21*x*|- ------------------- + ------------------- + ---------------------------|
| 2 2 5/2 |
| / 2\ / 2\ / 2\ |
| \-64 + x / \-64 + x / | x | |
| |1 - --| |
\ \ 64/ /
---------------------------------------------------------------------------------
32768
$$- \frac{21 x \left(\frac{x \sin{\left(\frac{\operatorname{acos}{\left(\frac{x}{8} \right)}}{2} \right)} \cos{\left(\frac{\operatorname{acos}{\left(\frac{x}{8} \right)}}{2} \right)}}{\left(1 - \frac{x^{2}}{64}\right)^{\frac{5}{2}}} + \frac{16384 \sin^{2}{\left(\frac{\operatorname{acos}{\left(\frac{x}{8} \right)}}{2} \right)}}{\left(x^{2} - 64\right)^{2}} - \frac{16384 \cos^{2}{\left(\frac{\operatorname{acos}{\left(\frac{x}{8} \right)}}{2} \right)}}{\left(x^{2} - 64\right)^{2}}\right)}{32768}$$