| $$ \begin{aligned}2a^3b^5+3a^5b^3+3+5a^2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3a^5b^3+2a^3b^5+5a^2+3\end{aligned} $$ | |
| ① | Combine like terms: $$ 3a^5b^3+2a^3b^5+5a^2+3 = 3a^5b^3+2a^3b^5+5a^2+3 $$ |