oo ____ \ ` \ / 2*n + 1 \ \ |x | ) |-------- + 1| / | 2 | / \ n / /___, n = 1
Sum(x^(2*n + 1)/n^2 + 1, (n, 1, oo))
// / 2\ | 2| \ ||polylog\2, x / for |x | <= 1| || | || oo | || ____ | || \ ` | oo + x*|< \ 2*n | || \ x | || ) ---- otherwise | || / 2 | || / n | || /___, | \\ n = 1 /
oo + x*Piecewise((polylog(2, x^2), |x^2| <= 1), (Sum(x^(2*n)/n^2, (n, 1, oo)), True))
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