The rules are: 1. When the BASES are the same, to MULTIPLY, you ADD the EXPONENTS.2. When the EXPONENTS are the same, to MULTIPLY, you MULTIPLY BASES. So is true and is just a case of rule 2. What there are no GENERAL rules for are: 1. , when V is a variable. 2. , when a variable V is an exponent in one term and not in another. Edwin