We are given the following expression:
To simplify this type of expression we need to add the coefficients of like terms, that is terms that have the same variable elevated to the same power. In this case, we have two terms that have the variable "y" elevated to 1. Therefore, we add the coefficients of those terms:
Since there are no more like terms then the expression can't be further simplified, and the answer is: 14y + 4x.