Hey nycmath.

You have to specify what kind of simplification, but usually simplification refers to collecting like terms and then factorizing the expression.

If we assume the above, then you are correct in saying that no further simplification exists.

Just for your information, factorization means turning an expression into things like (x-a)(x-b) and so on. If we don't want to factorize but still simplify then we collect like terms like say 2y + y + 3 = 3y + 3 = 3(y+1).