To simplify the expression \( 4 + \frac{n}{3} \), you can leave it as it is or rewrite it in a different form, but it cannot be simplified further without a specified value for \( n \).
If you're looking for a different representation, you could express it with a common denominator:
\[ 4 + \frac{n}{3} = \frac{12}{3} + \frac{n}{3} = \frac{12 + n}{3} \]
So \( 4 + \frac{n}{3} = \frac{12 + n}{3} \). If you need something specific done with this expression, please let me know!