Step-by-step explanation: you are asking for the second one. It is the associative property like I mentioned earlier because you are moving the paranthesis (only applies for multiplication and addition) and therefore associating the terms of the problem together
you need to combine everything that does not have an exponent (example. a, x, y) and you combine the ones that have exponents together. and therefore you get 6y-6 (remember positive and negative signs)
