(520+330)-400:4

To solve the expression (520 + 330) - 400 ÷ 4, we will follow the order of operations (PEMDAS/BODMAS).

1. First, perform the addition inside the parentheses: \( 520 + 330 = 850 \)

2. Next, perform the division: \( 400 ÷ 4 = 100 \)

3. Now, substitute back into the expression: \( 850 - 100 \)

4. Finally, perform the subtraction: \( 850 - 100 = 750 \)

So, the final result is 750.