\begin{frame}[t]
  \small
  
  \begin{definition}
  \alert{Leftmost innermost} strategy always reduces the leftmost of the innermost redexes.
  \end{definition}
  
  \pause
  \begin{example}[cont'd]
  \vspace{-1.5ex}
  \GREEN{
  \begin{align*}
  (0:\highlight{(1+2)})+(3+4)+(5+6)
  &\onslide<3->{\to (\highlight{(0:3)}+(3+4))+(5+6)}\\
  &\onslide<4->{\to (3+\highlight{(3+4)})+(5+6)} \\
  &\onslide<5->{\to \highlight{(3+7)}+(5+6)}\\
  &\onslide<6->{\to (1:0)+\highlight{(5+6)}}\\
  &\onslide<7->{\to \highlight{(1:0)+(1:1)}} \\
  &\onslide<8->{\to 1:\highlight{(0+(1:1))}}\\
  &\onslide<9->{\to 1:(1:\highlight{(0+1)})}\\
  &\onslide<10->{\to \highlight{1:(1:1)}} \\
  &\onslide<11->{\to \highlight{(1+1)}:1}\\
  &\onslide<12->{\to 2:1}
  \end{align*}
  }
  \vspace{-3ex}
  \end{example}
\end{frame}