| $$ \begin{aligned}12y^5+14y^5-y^3-3y^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}26y^5-4y^3\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{12y^5} + \color{blue}{14y^5} \color{red}{-y^3} \color{red}{-3y^3} = \color{blue}{26y^5} \color{red}{-4y^3} $$ |