Chapter 5 - Section 5.1 - Introduction to Polynomials and Polynomial Functions - Exercise Set - Page 325: 51

$8a^2b^4+3ab^2+8ab$

Consider the given polynomial $(3a^2b^4-5ab^2+7ab)-(-5a^2b^4-8ab^2-ab)$ Need to drop the parentheses. Thus, $(3a^2b^4-5ab^2+7ab)-(-5a^2b^4-8ab^2-ab)=3a^2b^4-5ab^2+7ab+5a^2b^4+8ab^2+ab$ or, $=3a^2b^4+5a^2b^4-5ab^2+8ab^2+7ab+ab$ or, $=8a^2b^4+3ab^2+8ab$