Perform the indicated operation

1. (6n
2 + 4n – 2) + (-3n + 8) = ____________

2. From the sum of 3x
3 + 7x
2 - 5 and 2x
2 + 3x + 8 take away 5x
2 + x -5.

3. What should be added to 3x
3 + 4x
2 -7 to have a sum of 4x
3 + x
2 + 5.









Nonsense answer
I will report ​