Apologises in advance if i'm being a bit thick, or this has been answered before, my searches on this forum and google were unsuccessful.

My problem is that I'm trying to find the rule for expanding brackets which contain multiplied variables. I've found hundreds of examples with addition and subtraction, but no multiplication...which I thought was a bit odd.

Example

a*b)(x*y)

How would this be expanded to remove the brackets? I have a feeling theres a few conditions such as like bases. My specific problem involves terms that are constants raised to a variable power (plus or minus a constant).

Many, many thanks in advance!