$$ \begin{aligned}3m^4(-5^6)& \xlongequal{ }3m^4\cdot(-15625) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-46875m^4\end{aligned} $$ | |
① | $$ 3 m^4 \cdot -15625 = -46875 m^{4} $$ |