deletions | additions       diff --git a/a) Number of blits.tex b/a) Number of blits.tex  index 983cfbe..04bb577 100644  --- a/a) Number of blits.tex  +++ b/a) Number of blits.tex 
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&= 5\sum_{i = 0}^{n-1} \left[4^i\right]\\  &= 5\frac{1 - 4^n}{1 - 4}\\  &= \frac{5 - 5 * 4^n}{-3}\\  &= (5 \frac{5  * 4^n - 5) / 3\\ 5}{3}  \end{split}  \end{equation}