PLEASE HELP! IM LIKE STUCK AND I NEED HELP! YOU'LL GET 50 POINTS !!!!

Answer:
5m + 9n + 46
Step-by-step explanation:
5m +10 +9n +36
(i did that by distributing from parenthesis)
5m + 9n + 46
(i just simplified by adding 10 and 36)