Verify: `(a/b+c/d)+e/f=a/b+(c/d+e/f)f` or `a/b=\ (-2)/3, c/d=5/7` a n d `e/f=(-1)/6dot`

Explanation

To verify the equation \((a/b + c/d) + e/f = a/b + (c/d + e/f)\) with the values \(a/b = -2/3\), \(c/d = 5/7\), and \(e/f = -1/6\), we will follow these steps:

### Step 1: Substitute the values into the left-hand side (LHS)
The left-hand side of the equation is:
\[ LHS = (a/b + c/d) + e/f \]
Substituting the values:
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