#### Answer

$-14+13i$

#### Work Step by Step

$\bf{\text{Solution Outline:}}$
To simplify the given expression, $
15i-(3+2i)-11
,$ remove the grouping symbols and then combine the real parts and the imaginary parts.
$\bf{\text{Solution Details:}}$
Removing the grouping symbols, the expression above is equivalent to
\begin{array}{l}\require{cancel}
15i-3-2i-11
.\end{array}
Combining the real parts and the imaginary parts results to
\begin{array}{l}\require{cancel}
(-3-11)+(15i-2i)
\\\\=
-14+13i
.\end{array}