## Precalculus (6th Edition) Blitzer

The value is $-31$.
Consider the given expression, \begin{align} & 2\left( -30-\left( -3 \right) \right)-3\left( 6-9 \right)+\left( -1 \right)\left( 1-15 \right)=2\left( -27 \right)+9+14 \\ & =-54+23 \\ & =-31 \end{align} This implies that, $2\left( -30-\left( -3 \right) \right)-3\left( 6-9 \right)+\left( -1 \right)\left( 1-15 \right)=-31$ Therefore, the simplified value of the expression is $-31$.