deletions | additions       diff --git a/a) As few classrooms as possible.tex b/a) As few classrooms as possible.tex  index e187f5f..a606b59 100644  --- a/a) As few classrooms as possible.tex  +++ b/a) As few classrooms as possible.tex 
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\begin{subequations}  \begin{align*}  T(n) &= c_0 + n\log{n} + (n-1) (c_1 + \log{n}) + n (c_2 + \log{n})\\  &= 3n\log{n} + n c_1 (c_1  + n c_2 c_2)  - \log{n} + c_0 - c_1\\ &\in \ordo{n\log{n}}  \end{align*}  \end{subequations}