Simplify each of the products: `(m+n/7)^3 (m-n/7)`

Explanation

To simplify the expression \((m + \frac{n}{7})^3 (m - \frac{n}{7})\), we can follow these steps:

### Step 1: Rewrite the expression
We start with the expression:
\[ (m + \frac{n}{7})^3 (m - \frac{n}{7}) \]
We can express \((m + \frac{n}{7})^3\) as:
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