Step 1:
The Binomial Theorem states that for any positive integer n, the expansion of the binomial (a-b)^n is given by:
$$(a-b)^{n}=\sum_{k=0}^{n}(-1)^{k} \binom{n}{k} a^{n-k} b^{k}$$
where $\binom{n}{k}$ is the binomial coefficient, which is the number of ways to
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