oo ____ \ ` \ n*(2 + cos(pi*n)) \ ----------------- / 3 / 2*n - 1 /___, n = 1
Sum((n*(2 + cos(pi*n)))/(2*n^3 - 1), (n, 1, oo))
oo ____ \ ` \ n*(2 + cos(pi*n)) \ ----------------- / 3 / -1 + 2*n /___, n = 1
Sum(n*(2 + cos(pi*n))/(-1 + 2*n^3), (n, 1, 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