| $$ \begin{aligned}19p^5-(-10p^5)& \xlongequal{ }19p^5+10p^5 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}29p^5\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{19p^5} + \color{blue}{10p^5} = \color{blue}{29p^5} $$ |