Yes!
In a sense, you have cubed the three- cubing the "b" is still "indicated"So you're just cubing the first term.
Yes, the exponent is on the parentheses so everything inside the parentheses is squared. Essentially, it is the old "order of operations", "PEDMAS": "Parentheses, then exponents, then ...." That is, you do the multiplication inside the parentheses, then do whatever is outside the parentheses.So if I had something like it would be ?