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

  \begin{exampleblock}{}
    Find the derivative of
    \begin{align*}
      f(x) = 2x \cdot \sin(x) \cdot \cos(x)
    \end{align*}
    \pause
    We have:
    \begin{align*}
      f(x) &= 2x \cdot \big(\sin(x) \cdot \cos(x)\big) \\
      \mpause[1]{f'(x) }&\mpause[1]{= }\mpause[2]{ 2x \cdot \frac{d}{dx} \big(\sin(x) \cdot \cos(x)\big) + \big(\sin(x) \cdot \cos(x)\big) \cdot \frac{d}{dx} 2x } \\
      &\mpause[3]{= 2x \cdot  \big(\sin(x) \cdot (-\sin(x)) + \cos(x)\cdot \cos(x)\big) } \\
          &\hspace{5cm} \mpause[3]{+ \big(\sin(x) \cdot \cos(x)\big) \cdot 2 } \\
      &\mpause[4]{= 2x \cdot  \big(\cos^2(x) - \sin^2(x)\big) + 2\sin(x)\cos(x) } \\
      &\mpause[5]{= 2x \cdot  \cos(2x) + \sin(2x) } 
    \end{align*}
  \end{exampleblock}
\end{frame}