(5+4)-5-1

4

To solve the expression (5+4)-5-1, follow the order of operations, which is parentheses, exponents, multiplication/division (from left to right), and addition/subtraction (from left to right).

1. Start with the addition inside the parentheses: (5+4) = 9.
Expression becomes: 9-5-1

2. Next, subtract 5 from 9: 9-5 = 4.
Expression becomes: 4-1

3. Finally, subtract 1 from 4: 4-1 = 3.

So, the final answer is 3.