The sum of the series `Sigma_(oo)^(n=0) (n^(2)-n+1)/(n!)` is

The sum of the series S=Sigma_(n=1)^(infty)(1)/(n-1)! is

The sum of the series S=Sigma_(n=1)^(infty)(1)/(n-1)! is

The sum of series Sigma_(n=1)^(oo) (2n)/(2n+1)! is

The sum of the series sum_(n=1)^oo(n^2+6n+10)/((2n+1)!) is equal to

Sum of the series Sigma_(r=1)^(n) rlog((r+1)/(r)) is

If the sum of the series Sigma_(n=0)^(oo) r^(n),|r|le 1 is s, then find the sum of the series Sigma_(n=0)^(oo) r^(2n),|r|le 1

The sum of series Sigma_(r=0)^(r) (-1)^r(n+2r)^2 (where n is even) is