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To evaluate the infinite sum 

\[
\sum_{n=1}^{\infty} \frac{n^4 \, (-4)^n}{(2n)!}
\]

we can approach it by using techniques from series analysis, potentially involving generating functions, special series expansions, or methods like the ratio test to understand convergence.

Would you like a detailed solution or a particular approach to this problem? 

Here are some related questions to expand your understanding:
1. How do we determine if an infinite series converges?
2. What methods can be used to simplify series involving factorials?
3. Can generating functions help in evaluating such series?
4. How does the power of \( n \) in the numerator affect convergence?
5. What techniques are available for sums involving \( (-1)^n \) terms?

**Tip:** For series involving factorials in the denominator, consider comparing them to known Taylor series expansions to simplify.

Evaluate the infinite sum: \( \sum_{n=1}^{\infty} \frac{n^4 \, (-4)^n}{(2n)!} \)

Learn how to evaluate the infinite sum \( \sum_{n=1}^{\infty} \frac{n^4 \, (-4)^n}{(2n)!} \) using techniques like the ratio test and series analysis. This problem is ideal for college-level mathematics students, covering core concepts in series convergence and factorial manipulation.

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