| $$ \begin{aligned}(-3x^3y^4)^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-27x^9y^{12}\end{aligned} $$ | |
| ① | $$ \left( -3x^3y^4 \right)^3 = (-3)^3 \left( x^3 \right)^3 \left( y^4 \right)^3 = -27x^9y^{12} $$ |