| $$ \begin{aligned}16+12i-13-17i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-5i+3\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{16} + \color{red}{12i} \color{blue}{-13} \color{red}{-17i} = \color{red}{-5i} + \color{blue}{3} $$ |