deletions | additions       diff --git a/Intro.tex b/Intro.tex  index 7bef12e..79ccd4a 100644  --- a/Intro.tex  +++ b/Intro.tex 
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And so on:  \[ \rho(t) = \rho(0) + \sum_{n=0}^{\infty}{} \]  You can get started by \textbf{double clicking} this text block and begin editing. You can also click the \textbf{Insert} button below to add new block elements. Or you can \textbf{drag and drop an image} right onto this text. Happy writing! \sum_{n=0}^{\infty}{\left(\frac{-i}{\hbar}\right)^n \int_{0}^{t}{dt_1 \int_{0}^{t_1}{dt_2 ... \int_{0}^{t_{n-1}}{dt_n [H(t_1),[H(t_2),...[H(t_n),\rho(t_n)]...]]}}}}\]