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