Answer:
Answer: 4. m³ + m²
Step-by-step explanation:
[tex]{ \rm{ {2m}^{2} - {m}^{2} (7 - m) + {6m}^{2} }} \\ \\ { \rm{ = {2m}^{2} - {7m}^{2} + {m}^{3} + 6 {m}^{2} }} \\ \\ { \rm{ = (2 - 7 + 6) {m}^{2} + {m}^{3} }} \\ \\ = { \rm{ {m}^{3} + {m}^{2} }}[/tex]
