| $$ \begin{aligned}(2x^5y^6\cdot2 \cdot \frac{y^5}{(x^4y^2)^2})^3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}(4x^5y^6\frac{y^5}{(x^4y^2)^2})^3\end{aligned} $$ | |
| ① | $$ 2 x^5 y^6 \cdot 2 = 4 x^{5} y^{6} $$ |