5-3!

The expression 5-3! can be evaluated by remembering the order of operations, which is typically represented by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).

First, let's calculate the factorial of 3, denoted by "3!". The factorial of a number is the product of all positive integers less than or equal to that number. So, 3! = 3 x 2 x 1 = 6.

Now, we can substitute the factorial value into the expression: 5 - 6.

Finally, subtract 6 from 5: 5 - 6 = -1.

So, 5-3! equals -1.