| $$ \begin{aligned}4b^3-3b^5-7b^3+5b^5+10b& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2b^5-3b^3+10b\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{4b^3} \color{red}{-3b^5} \color{blue}{-7b^3} + \color{red}{5b^5} +10b = \color{red}{2b^5} \color{blue}{-3b^3} +10b $$ |