Simplify each of the products: `(x/2-2/5)(2/5-x/2)-x^2+2x`

Explanation

To simplify the expression \((\frac{x}{2} - \frac{2}{5})(\frac{2}{5} - \frac{x}{2}) - x^2 + 2x\), we will follow these steps:

### Step 1: Rewrite the expression
We start with the expression:
\[ (\frac{x}{2} - \frac{2}{5})(\frac{2}{5} - \frac{x}{2}) - x^2 + 2x \]

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