Calculate the sum of infinite series with general term $\frac{n^2}{2^n}$.
36674
Summation of series $\sum_{n=1}^\infty \frac{n^a}{b^n}$?
38760
Infinite Series $\sum\limits_{n=0}^\infty\frac{(-1)^n}{(2n+1)^{2m+1}}$
152227
How to sum this series to infinity: $\sum_{n=0}^{\infty} \frac1{2^{2^n}}$
14883
Find $\sum_{n=1}^{\infty}$ $\frac{n^{2}}{\left(n+1\right)\left(n+2\right)\left(n+3\right)\left(n+4\right)}$
105590
How to find sum of power series $\sum_{n=0}^\infty\frac{1}{n!(n+2)}$ by differentiation and integration?
28378
Find the infinite sum of the series $\sum_{n=1}^\infty \frac{1}{n^2 +1}$
127189
sum of this series: $\sum_{n=1}^{\infty}\frac{1}{4n^2-1}$
37771
Sum of a power series $n x^n$
151477
computing the series $\sum_{n=1}^\infty \frac{1}{n^2 2^n}$
44754
Infinite Series $\sum\limits_{n=1}^{\infty}\frac{1}{4^n\cos^2\frac{x}{2^n}}$
53658
Find the sum series $\sum_{n=1}^{+\infty} \frac{(-1)^{n-1}(2n-1)}{2^{n-1}}$
54604
Evaluate $ \sum_{m > n > 0} \frac{m^2 - n^2}{(m^2 + n^2)^2} $
148143
Find the sum to n terms as well as the sum to infinity of the series:
113189
Find the sum of the series $1^2-2^2+3^2-4^2+...-(2n)^2$
112950
Find the value of infinite series $\sum_{n=1}^{\infty} \tan^{-1}(2/n^2)$
50435
Infinite Series $‎\sum\limits_{n=2}^{\infty}\frac{\zeta(n)}{k^n}$
23945
Infinite Series: Fibonacci/ $2^n$