( 1 345 + 25 ) : 2 * 5 * 2 - 2 283 * 3

Let's break down the expression step by step.

1. Calculate the value inside the parentheses: \( 1345 + 25 = 1370 \).

2. Now divide by 2: \( 1370 \div 2 = 685 \).

3. Multiply by 5: \( 685 \times 5 = 3425 \).

4. Multiply by 2: \( 3425 \times 2 = 6850 \).

5. Now calculate \( 2,283 \times 3 \): \( 2283 \times 3 = 6849 \).

6. Subtract \( 6849 \) from \( 6850 \): \( 6850 - 6849 = 1 \).

So, the final result is \( 1 \).