$$ \begin{aligned}-8a^2-22+4a^3b^3-2a^3+7& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}4a^3b^3-2a^3-8a^2-15\end{aligned} $$ | |
① | Combine like terms: $$ -8a^2 \color{blue}{-22} +4a^3b^3-2a^3+ \color{blue}{7} = 4a^3b^3-2a^3-8a^2 \color{blue}{-15} $$ |