Explicit closed form $\sum \frac{1}{an^2+bn+c}$
90030
What would be the value of $\sum\limits_{n=0}^\infty \frac{1}{an^2+bn+c}$
119552
Summing Finitely Many Terms of Harmonic Series: $\sum_{k=a}^{b} \frac{1}{k}$
124229
Simplify $\sum_{k=0}^{\infty} x^ky^{\frac{k(k+1)}{2}}$
634
Closed form formula for $\sum\limits_{k=1}^n k^k$
152698
Evaluation of $\sum_{n=0}^{\infty}\frac{1}{(n^4+n^2+1)n!}$
42736
Is there a closed form for $\sum_{k=0}^n \frac{x^k}{k!}$?
89698
Please help with $\sum\limits_{r=1}^{N}\frac{2r+3}{3^r(r+1)}$
42326
Complex Analysis Solution to the Basel Problem ($\sum_{k=1}^\infty \frac{1}{k^2}$)
47753
Closed form of series with factorial-squared denominator?
36457
Closed form for $\int \frac{1}{\sin^nx +\cos^mx}dx$
37007
Evaluating $\sum_{k=1}^{n} \frac{1}{k(k+1)}$
113713
Closed formula for the sum of the following series
150148
Sum of $\sum^\infty_{n=2} \frac{1}{\ln{(n!)}}$
60673
To prove $\sum_{cyc}\frac{1}{a^3+b^3+abc} \le \frac{1}{abc}$
54604
Evaluate $ \sum_{m > n > 0} \frac{m^2 - n^2}{(m^2 + n^2)^2} $
135218
Closed Form for Factorial Sum
10222
Simplify $\sum (x_i- \mu)^2$