Answer
$6+i$
Work Step by Step
Removing the grouping symbols and then combining the real parts and the imaginary parts, the given expression is equivalent to
\begin{array}{l}\require{cancel}
(9-7i)-(3-8i)
\\\\=
9-7i-3+8i
\\\\=
(9-3)+(-7i+8i)
\\\\=
6+i
.\end{array}
