## Elementary Algebra

We write an expression to express this addition problem: (-4$n^{2}$ - n - 1) + (4$n^{2}$ + 6n -5) = Group similar terms. (-4$n^{2}$ + 4$n^{2}$) + (6n -n) + (-5 -1) = Simplify. 0 + 5n - 6 = 5n - 6