4. \( 8+6 q+q \)

When simplifying the expression \( 8 + 6q + q \), it’s important to combine like terms. Here, \( 6q \) and \( q \) are like terms because they both contain the variable \( q \). So, you can add them together: \( 6q + 1q = 7q \). Therefore, the simplified expression becomes \( 8 + 7q \). Just remember, whenever you see terms with the same variable, combine them to make your expression neater and easier to work with! It's like tidying up your room; everything falls into place!