| $$ \begin{aligned}s^2(1+0.01s+0.0001s)& \xlongequal{ }s^2(1+0s+0s) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}s^2\cdot1\end{aligned} $$ | |
| ① | Combine like terms: $$ 1 \, \color{blue}{ \cancel{0s}} \, \, \color{blue}{ \cancel{0s}} \, = 1 $$ |