Using binomial theorem, evaluate : `(99)^5`

Explanation

To evaluate \( 99^5 \) using the binomial theorem, we can express \( 99 \) as \( 100 - 1 \). Hence, we need to evaluate \( (100 - 1)^5 \).

### Step-by-Step Solution:

1. **Identify the Binomial Expansion**:
The binomial theorem states that:
\[
(x + y)^n = \sum_{k=0}^{n} \binom{n}{k} x^{n-k} y^k
...