oo ____ \ ` \ cos(pi*n) 4 \ ---------*(n + 1) ) 3 / ------------------ / 3 /___, n = 0
Sum(((cos(pi*n)/3)*(n + 1)^4)/3, (n, 0, oo))
oo ____ \ ` \ 4 \ (1 + n) *cos(pi*n) / ------------------ / 9 /___, n = 0
Sum((1 + n)^4*cos(pi*n)/9, (n, 0, oo))
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