oo ____ \ ` \ / n \ \ | (-1) | / |-------*4*n + 1| / \2*n + 1 / /___, n = 0
Sum((((-1)^n/(2*n + 1))*4)*n + 1, (n, 0, oo))
oo ____ \ ` \ / n\ \ | 4*n*(-1) | / |1 + ---------| / \ 1 + 2*n / /___, n = 0
Sum(1 + 4*n*(-1)^n/(1 + 2*n), (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