Answer
$$15s^5-2s^5+4s^7+3s^7+2=7s^7+13s^5+2$$
Explanation
| $$ \begin{aligned}15s^5-2s^5+4s^7+3s^7+2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}7s^7+13s^5+2\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{15s^5} \color{blue}{-2s^5} + \color{red}{4s^7} + \color{red}{3s^7} +2 = \color{red}{7s^7} + \color{blue}{13s^5} +2 $$ |
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