| $$ \begin{aligned}4x^2y^{11}-16x^4y^8-24x^6y^7-32x^6y^6-32x^8y^5-16x^8y^4-12x^{10}y^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-12x^{10}y^3-32x^8y^5-24x^6y^7+4x^2y^{11}-16x^8y^4-32x^6y^6-16x^4y^8\end{aligned} $$ | |
| ① | Combine like terms: $$ -12x^{10}y^3-32x^8y^5-24x^6y^7+4x^2y^{11}-16x^8y^4-32x^6y^6-16x^4y^8 = -12x^{10}y^3-32x^8y^5-24x^6y^7+4x^2y^{11}-16x^8y^4-32x^6y^6-16x^4y^8 $$ |