Find the sum and express it in simplest form (5n^3+7n+2)+(-n^3-6n+5)

 4n^3 +n +7

Step-by-step explanation:

(5n^3+7n+2)+(-n^3-6n+5)

I like to line them up vertically

 5n^3+7n+2

-n^3  -6n+5

 4n^3 +n +7

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.

answer: i guess 5 units?

step-by-step explanation: