\begin{frame}
  \frametitle{2nd Midterm Exam - Review}

  \begin{exampleblock}{}
    Find the derivative of
    \begin{align*}
      f(x) = \cos(\sin(x^2))
    \end{align*}
    \pause
    We have:
    \begin{align*}
      f'(x) 
      &= \mpause[1]{ -\sin(\;\sin(x^2)\;) \cdot \frac{d}{dx} (\sin(x^2)) } \\
      &\mpause[2]{= -\sin(\;\sin(x^2)\;) \cdot \cos(x^2) \cdot \frac{d}{dx} x^2 } \\
      &\mpause[3]{= -\sin(\;\sin(x^2)\;) \cdot \cos(x^2) \cdot 2x } 
    \end{align*}
  \end{exampleblock}
\end{frame}