Let's break down the expression you provided step by step:

The expression you provided seems to resemble two parts. However, it seems a bit unclear regarding the structure due to the repeated elements. It looks like it could be split into:

1. \((-5.06) \cdot (-142.2) + 42.2 \cdot (-5.06)\)
2. \((-5.06) \cdot (-142.2) + 42.2 \cdot (-5.06)\)

Since both parts are identical, the result will be the same for each calculation, and I will calculate it once.

Let's calculate:

### Step 1: Calculate \((-5.06) \cdot (-142.2)\)

\[
(-5.06) \cdot (-142.2) = 5.06 \cdot 142.2 = 718.932
\]

### Step 2: Calculate \(42.2 \cdot (-5.06)\)

\[
42.2 \cdot (-5.06) = -213.092
\]

### Step 3: Combine the results

Now, we combine the results from Step 1 and Step 2:

\[
718.932 + (-213.092) = 718.932 - 213.092 = 505.84
\]

### Final Result

Since the expression you provided appears to repeat itself, the final result is:

\[
\text{Final Result} = 505.84
\]

If you meant something different or if there are additional calculations to perform, please clarify!