600-(80-25)

To calculate this, we can follow the order of operations, which is parentheses, exponents, multiplication and division (from left to right), and addition and subtraction (from left to right).

First, let's solve the expression inside the parentheses:

80 - 25 = 55

Now we can substitute this value back into the original expression:

600 - 55

Finally, subtracting:

600 - 55 = 545

So, 600 - (80 - 25) equals 545.