Chapter 4 - Polynomials - 4.4 Addition and Subtraction of Polynomials - 4.4 Exercise Set - Page 260: 40

$4x+1$

Removing the grouping symbols, then the given expression, $ (7x+3)-(3x+2) $, is equivalent to \begin{array}{l} 7x+3-3x-2 .\end{array} By combining like terms, then \begin{array}{l} (7x-3x)+(3-2) \\\\= 4x+1 .\end{array}