9-(72+28

To solve the expression 9 - (72 + 28), we need to follow the order of operations, also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction).

First, let's simplify what is inside the parentheses: 72 + 28 = 100

Now, let's substitute the simplified value into the original expression: 9 - 100

Finally, perform the subtraction: 9 - 100 = -91

So, the final answer is -91.