Chapter 5 - Exponents and Polynomials - 5.1 - Addition and Subtraction of Polynomials - Problem Set 5.1 - Page 195: 38

$-7n^2+13n+19$

We write an expression to express this subtraction problem: $(-4n^2+6n+10)-(3n^2-7n-9)$ We use the commutative, associative, and distributive properties to group like terms: $(-4-3)n^2+(6-(-7))n+(10-(-9))$ We combine the like terms within each set of parentheses: $-7n^2+13n+19$