Chapter 5 - Section 5.1 - Introduction to Polynomials and Polynomial Functions - Exercise Set - Page 325: 38

$-6x^4y^2-3x^2y^2+xy-4x^2y$

Consider the given polynomial $(10x^4y^2-3x^2y^2+2xy)+(-16x^4y^2-4x^2y-xy)$ Need to drop the parentheses. Thus, $(10x^4y^2-3x^2y^2+2xy)+(-16x^4y^2-4x^2y-xy)=10x^4y^2-3x^2y^2+2xy-16x^4y^2-4x^2y-xy$ or, $=10x^4y^2-16x^4y^2-3x^2y^2-4x^2y+2xy-xy$ or, $=-6x^4y^2-3x^2y^2+xy-4x^2y$