| $$ \begin{aligned}x^5-24-5x^5+13& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-4x^5-11\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{x^5} \color{red}{-24} \color{blue}{-5x^5} + \color{red}{13} = \color{blue}{-4x^5} \color{red}{-11} $$ |