/ 4 8 12 16 18 14 10 6 2 \
21 |-51090942171709440000 - 425757851430912000*x - 140792940288000*x - 8204716800*x - 143640*x + 420*x + 39070080*x + 1279935820800*x + 10137091700736000*x + 8515157028618240000*x 51090942171709440000*sin(x)|
x *|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + ---------------------------|
| 20 21 |
\ x x /
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
51090942171709440000
$$\frac{x^{21} \left(\frac{420 x^{18} - 143640 x^{16} + 39070080 x^{14} - 8204716800 x^{12} + 1279935820800 x^{10} - 140792940288000 x^{8} + 10137091700736000 x^{6} - 425757851430912000 x^{4} + 8515157028618240000 x^{2} - 51090942171709440000}{x^{20}} + \frac{51090942171709440000 \sin{\left(x \right)}}{x^{21}}\right)}{51090942171709440000}$$
x^21*((-51090942171709440000 - 425757851430912000*x^4 - 140792940288000*x^8 - 8204716800*x^12 - 143640*x^16 + 420*x^18 + 39070080*x^14 + 1279935820800*x^10 + 10137091700736000*x^6 + 8515157028618240000*x^2)/x^20 + 51090942171709440000*sin(x)/x^21)/51090942171709440000