To understand how to find an expression equivalent to the complex fraction , let’s break it down step by step.

### Step 1: Understanding the structure

The given expression is a complex fraction, which means we have a fraction within a fraction. Here’s how it looks:

At the numerator, we have .

### Step 2: Finding a common denominator

To simplify the expression, we need to eliminate the fractions within the numerator and denominator. To do this, let’s find a common denominator for both the numerator and denominator.

**Numerator**:

The numerator is .

We can rewrite to give it a common denominator with .

So:

**Denominator**:

The denominator is .

Similarly, rewrite (1) as

### Step 3: Simplifying the complex fraction

Now substitute these simplified forms back into the original expression:

This is a fraction divided by a fraction. To simplify, multiply by the reciprocal of the denominator:

### Step 4: Canceling the common factor

The (y) terms in the numerator and denominator cancel out, leaving us with:

### Final Answer:

The expression equivalent to the complex fraction is:

This is the simplified form of the original complex fraction.

### Summary:

To simplify a complex fraction like :

- Rewrite terms to have a common denominator.
- Simplify the numerator and denominator individually.
- Use the rule of dividing fractions (multiply by the reciprocal).
- Cancel out common terms to get the final simplified result.

The equivalent expression is .