5 minus the product of 3 and a number
The expression that represents the product of a number 5 and b is 5b.
It is: 15x
If you call your number x, the expression would be 5x.
the product of 23 and a number
n*35 or 35n
It is 35*n or 35n.
The two mean the same thing A product is a multiple.
There is no special name - other than product.