$$ \begin{aligned}(5y^3)^3\cdot36y^{10}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}125y^9\cdot36y^{10} \xlongequal{ } \\[1 em] & \xlongequal{ }4500y^{19}\end{aligned} $$ | |
① | $$ \left( 5y^3 \right)^3 = 5^3 \left( y^3 \right)^3 = 125y^9 $$ |