1.)--9a3 + 5a3 + 7b3
2.)8m - 5m5 + 3m5
3.)(6c - 2d) + (-3c + 9d)
4.)(5y2 - 8m - 9) + (-3y2 – 4 +3m)
5.)2r + (4p + 3r) - (2p - 2r)
![19a3 5a3 7b328m 5m5 3m536c 2d 3c 9d45y2 8m 9 3y2 4 3m52r 4p 3r 2p 2r class=](https://ph-static.z-dn.net/files/d28/d27259e49e19f85eb7397a9823f13736.jpg)