oo ____ \ ` \ n n + 1 \ (-1) *x / ------------ / (n + 1)! /___, n = 0
Sum(((-1)^n*x^(n + 1))/factorial(n + 1), (n, 0, oo))
/ -x\ |1 e | x*|- - ---| \x x /
x*(1/x - exp(-x)/x)
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