# How do I input images, code, and groovy typeset mathematics?

To start a discussion, just hit the big New Discussion button that appears when you're logged into the front page. To comment on an existing discussion, just start typing in the Leave a Comment box that appears at the bottom of a discussion. This should look something like so:

Generally, input is Markdown but you've got a few buttons above the comment box to help you out. In particular, the button on the right is for uploading images. That's how included the images in this post.

## Typeset mathematics

Sometimes, we'd like to enter typeset mathematics. For example, the equation of a line is %%y=mx+b%%. This is accomplished by wrapping the portion you want typeset in delimiters `%%like so%%`

. Thus, for example, I typed the equation of line like so: `%%y=mx+b%%`

.