oo ____ \ ` \ n n \ 3 - (-1) / ---------- / (2*n + 1)! /___, n = 1
Sum((3^n - (-1)^n)/factorial(2*n + 1), (n, 1, oo))
___ / ___\ \/ 3 *sinh\\/ 3 / -sin(1) + ----------------- 3
-sin(1) + sqrt(3)*sinh(sqrt(3))/3
x^n/n
(x-1)^n
1/2^(n!)
n^2/n!
x^n/n!
k!/(n!*(n+k)!)
csc(n)^2/n^3
1/n^2
1/n^4
1/n^6
1/n
(-1)^n
(-1)^(n + 1)/n
(n + 2)*(-1)^(n - 1)
(3*n - 1)/(-5)^n
(-1)^(n - 1)*n/(6*n - 5)
(-1)^(n + 1)/n*x^n
(3*n - 1)/(-5)^n