| $$ \begin{aligned}7x^2y-5x+8y^2-3x^2y+2x-6y^2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}4x^2y+2y^2-3x\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{7x^2y} \color{red}{-5x} + \color{green}{8y^2} \color{blue}{-3x^2y} + \color{red}{2x} \color{green}{-6y^2} = \color{blue}{4x^2y} + \color{green}{2y^2} \color{red}{-3x} $$ |