Chapter 1 - Introduction to Algebraic Expressions - 1.8 Exponential Notation and Order of Operations - 1.8 Exercise Set - Page 67: 95

$-4a+3b-7c$

Since the grouping symbol is preceded by a negative sign, then the sign of each term inside the grouping symbol alters once the grouping symbol is removed. Hence, the given expression, $ -(4a-3b+7c) $, is equivalent to \begin{array}{l}\require{cancel} -4a+3b-7c .\end{array}