| $$ \begin{aligned}(-x^2y)^3x^3y^2z^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-x^6y^3x^3y^2z^3 \xlongequal{ } \\[1 em] & \xlongequal{ }-x^9y^5z^3\end{aligned} $$ | |
| ① | $$ \left( -x^2y \right)^3 = (-1)^3 \left( x^2 \right)^3y^3 = -x^6y^3 $$ |