Combine like terms: subtract the coefficients of \(s\).<br><br>
&bull; \(s\) means \(1s\)<br>
&bull; \(14s - s = 14s - 1s\)<br>
&bull; \(14 - 1 = 13\), so the result is \(13s\)<br><br>
Final Answer: C: \(13s\)