so to create a word phrase, you have to identify all of the operations going on here...
5(17 - 8)
within the parentheses, you have subtraction. that's usually called the "difference" in word phrases. you also have a 5 outside the parentheses, leaving it to be multiplied inside, and multiplication is typically referred to as a "product"
with that info, you can construct a word phrase such as "the product of 5 and the difference between 17 and 8" or "the difference between 17 and 8 multiplied by 5"