## Elementary Algebra

$-7x^2-13x-7$
We write an expression to express this addition problem: $(2x^2-7x-10)+(-6x-2)+(-9x^2+5)$ We use the commutative, associative, and distributive properties to group like terms: $(2-9)x^2+(-7+(-6))x+(-10+(-2)+5)$ We combine the like terms within each set of parentheses: $-7x^2+(-13x)+(-7)=-7x^2-13x-7$