<p>I want to know if this is simplifed correctly
(x^2)(-5sin(5x)+(2x)(cos(5x))=
-5x^2sin(5x)+2xcos(5x)</p>
<p>Can it be simplified mroe if correct? I used the product rule to achieve what you see</p>
<p>Also, I now have to take the 2nd derivative, do I do two sets of product rules and add the result?</p>