| $$ \begin{aligned}(2y^3z^4)^3xy^3z& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}8y^9z^{12}xy^3z \xlongequal{ } \\[1 em] & \xlongequal{ }8xy^{12}z^{13}\end{aligned} $$ | |
| ① | $$ \left( 2y^3z^4 \right)^3 = 2^3 \left( y^3 \right)^3 \left( z^4 \right)^3 = 8y^9z^{12} $$ |