2. Go to your Blogger dashboard and select layout
3. Click Add a Gadget on your right sidebar (or left depending on your tempate) and add HTML/Javascript onto your sidebar
4. Leave out the title and past the javascript that you copied in step 1 right into the content and then save
4. Thats it! You are done. Now you can type your latex code between two dollar signs to get the inline style math symbols or write it as or 
to get a display style math symbols (just play around to see their differences)There are some notes regarding the above installation:
The javascript above will also produce on on your sidebar a logo an a link to this very post. The idea is that if a visitor of your blog also wants to install latex on her blog then she can follow the link to this post. The logo will look like this
The link is
http://watchmath.com/vlog/?p=1461
Usage
- Use $\LaTeX$ in order to get an inline math in \textstyle mode. For example if you type $\sum_{i=1}^nx_i$ (in blogger) you get .
- Use $$\LaTeX $$ to gen an inline math in \displaystyle mode. For example if you type $$\sum_{i=1}^nx_i$$ (in blogger) you get .
- Use \[\LaTeX\] to get a math symbol written in a new line and aligned center. For example if you type \[\sum_{i=1}^nx_i\] (in blogger) you get
Gauss law
\[\oint_{S}\vec{E}\cdot d\vec{S}=-\frac{q}{\varepsilon_{0}}\]
