Answer:
C
Step-by-step explanation:
Assuming that the symbols before 8211 and the number itself are a minus that the pc didn’t recognise
1) multiply 4 for 5mn^4 and 5n. (Mutiply numbers for numbers and don’t change the literal part)
20mn^4 + 20n - 5mn^4 -2
2) sum the like therms (with the same literal part)
15mn^4 + 20n - 2
