Answer: 9q + 4r + 4s + 4p
Step-by-step explanation:
This problem utilizing an essential part of later math: combining like terms.
If two terms have the same variable, their coefficients may be added just like any constants. As such, you can simplify the equation as follows:
3q + 6q + 4r + 4s + 6p - 2p
9q + 4r + 4s + 4p
Hope it helps :) and let me know if you want me to elaborate.