What is the coefficient of $x^{11}$ in the power series expansion of $\frac{1}{1-x-x^4}$?
54131
How to do power series expansion
116219
How can I find  $\int\frac1{\sqrt[4]{1+x^4}}\mathrm dx$?
35643
How to use the method of "Hensel lifting" to solve $x^2 + x -1 \equiv 0\pmod {11^4}$?
157918
Finding the derivative of $x^x$
144953
Value of $\frac{x^n -a^n}{ x-a}$?
74664
A question regarding power series expansion of an entire function
86194
Infinite series with the binomial coefficient
127189
sum of this series: $\sum_{n=1}^{\infty}\frac{1}{4n^2-1}$
96700
How is $\dfrac1{(1-x)^5}=\sum_{n\geq0}{n+4\choose4}x^n$
21993
Taylor Expansion $\log(\frac{1+z}{1-z})$
62913
Understanding $\sum_{n=1}^{\infty} \frac{1}{n^4} = \frac{\pi^4}{90}$
17056
How to find answer to the sum of series $\sum_{n=1}^{\infty}\frac{n}{2^n} $
128540
Formal power series coefficient multiplication
67434
Finding the infinite series: $3 \cdot \frac{9}{11} + 4 \cdot \left(\frac{9}{11}\right)^2 + 5 \cdot \left(\frac{9}{11}\right)^3 + \cdots$?
37771
Sum of a power series $n x^n$
63829
Use Cauchy product to find a power series represenitation of $1 \over {(1-x)^3}$
69270
Questions about the powerseries $\sum_{n=0}^{\infty}\frac{1}{n^d}z^n,d\in\mathbb{R},z\in\mathbb{C}$