Chapter 1 - Introduction to Algebraic Expressions - 1.8 Exponential Notation and Order of Operations - 1.8 Exercise Set - Page 66: 64

$-54$

Using order of operations, the given expression, $ -48\div(7-9)^3-2[1-5(2-6)+3^2] $, evaluates to \begin{array}{l} -48\div(-2)^3-2[1-5(-4)+9] \\\\= -48\div(-8)-2[1+20+9] \\\\= 6-2[30] \\\\= 6-60 \\\\= -54 .\end{array}