Plz help me get the right answer to these

16m³ + 4n
remove the bracket and collect like terms
9m³ + 4n +7m³
= (9m³ + 7m³ ) + 4n = 16m³ + 4n
Step-by-step explanation:
[tex](9m^3+4n)+7m^3\qquad\text{combine like terms}\\\\=(9m^3+7m^3)+4n\\\\=16m^3+4n[/tex]