| $$ \begin{aligned}4x^2+2-5x^2+6x^8-13-x^8& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}5x^8-x^2-11\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{4x^2} + \color{red}{2} \color{blue}{-5x^2} + \color{green}{6x^8} \color{red}{-13} \color{green}{-x^8} = \color{green}{5x^8} \color{blue}{-x^2} \color{red}{-11} $$ |