| $$ \begin{aligned}2-10i-6-i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-11i-4\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{2} \color{red}{-10i} \color{blue}{-6} \color{red}{-i} = \color{red}{-11i} \color{blue}{-4} $$ |