deletions | additions       diff --git a/beginproblem_a_You_a.tex b/beginproblem_a_You_a.tex  index b47e6a2..9a8c5f2 100644  --- a/beginproblem_a_You_a.tex  +++ b/beginproblem_a_You_a.tex 
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\\$W(k+1) = 2^{k+2}-2k-4+k+1$  \\$W(k+1) = 2^{k+2}-k-3$  \\Therefore, $W(n) = 2^{n+1}-n-2$  \\  \textit{ Q.E.D.}  \end{proof}