deletions | additions       diff --git a/Complexity analysis.tex b/Complexity analysis.tex  index f78a55c..83bc0ec 100644  --- a/Complexity analysis.tex  +++ b/Complexity analysis.tex 
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\item $\displaystyle\sum_{n=s}^t f(n) + \sum_{n=s}^{t} g(n) = \sum_{n=s}^t \left[f(n) + g(n)\right]$  \item $\displaystyle\sum_{n=s}^t f(n) + \sum_{n=s}^{t} g(n) = \sum_{n=s}^t \left[f(n) + g(n)\right]$  \item $\displaystyle\sum_{i=m}^n 1 = n+1-m \therefore \sum_{i=m}^{n-1} 1 = n-m$  \item $\displaystyle\sum_{i=m}^n i = \frac{n(n+1)}{2} - \frac{m(m-1)}{2} \therefore \sum_{i=m}^{n-1} i  = \frac{(n+1-m)(n+m)}{2}$ \frac{n(n-1)}{2} - \frac{m(m-1)}{2}$  \end{enumerate}