| $$ \begin{aligned}8y^2+5+7y+5& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}8y^2+7y+10\end{aligned} $$ | |
| ① | Combine like terms: $$ 8y^2+ \color{blue}{5} +7y+ \color{blue}{5} = 8y^2+7y+ \color{blue}{10} $$ |