deletions | additions       diff --git a/a) Number of blits.tex b/a) Number of blits.tex  index f600f99..52e981e 100644  --- a/a) Number of blits.tex  +++ b/a) Number of blits.tex 
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\begin{split}  T(2^{n+1}) &= 5 + 4\frac{5 \cdot 4^n - 5}{3}\\  &= 5 + \frac{5 \cdot 4^{n+1} - 5 \cdot 4}{3}\\  &= \frac{5 \cdot 4^{n+1} + 5 * \cdot  3 - 5 \cdot 4}{3}\\ &= \frac{5 \cdot 4^{n+1} - 5}{3}  \end{split}  \end{equation}