 Welcome back to the session on latex. In session 12, we explored the different ways in which we can style and typeset our content using different font styles and sizes like text BF, EMPH, large, huge, etcetera. Session 13 was a bit more interesting as we could finally add colors to the text and page. We also mix two colors to get a different color. Session 14 dealt with alignment. By default, the content is justified. To change the alignment of a large part in the document, the commands are flush left, flush right and centering. To change the alignment of only a certain part, it is advised to use environments which are flush left, center and flush right. In session 15, using the set space package, we can typeset the entire document or a certain part in single one half or double spacing. We also looked at vertical and horizontal spacing. Some of the most used commands are V fill and H fill. In session 16, we learnt to organize content into points. Itemize enumerate and description environments help us do the needful. In session 17, we looked at typesetting mathematics in latex and experienced how beautifully typesets with hardly any efforts from our side. We covered basic mathematics, finding unknown symbols by drawing, fractions, summations and changing the size of the braces. In the last session, we explored some more concepts like typesetting integration, limits, matrices and equations. This completes topic 3 of our course. Thank you. Have a nice day.