Hey, have I done these correctly? I'm not confidant of the rules at all, especially with b:

a) $\displaystyle y=3sin^2(x)+sec(2x)$

$\displaystyle \frac{dy}{dx}=6cos^2(x)+2sec(2x)tan(2x)$

b)$\displaystyle y=[x+ln(2x)]^3$

With this example, I could solve it easily if not for the $\displaystyle ]^3$ at the end. How would this affect my answer?