Definition of "brief" for a personal statement?

[Dishsoap]

Here's the description of the personal statement for one university for which I'm applying for graduate school:

Please upload a document briefly describing your past work in your proposed or allied fields of study, including non-course educational experiences, teaching, or other relevant employment, publications, theses, research in progress, other scholarly activities, and your plans for graduate study and a professional career.
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I'm not sure what is considered "brief". I have a 3-page personal statement which I have been trying to whittle down, but it's difficult to do so while still including all of the relevant topics. I've talked for maybe 2 or 3 sentences about each project which led to a paper (5 total), and then 3-4 sentences about each research experience outside of my own university (two internships). I've also talked about TA experience for 3-4 sentences (I've TA'd 15 sections, and in charge of tutoring for the department). Of course, I talk for a paragraph about who I'd be interested in doing research with at the university and why I'm a good fit for the program (same school I did my REU at, so a lot to talk about there).

I don't know what to start cutting without cutting out vital information, you know? But at the same time, I doubt anyone on an admissions committee cares enough to read three pages from each applicant.

Thoughts?

 

[Dr. Courtney]

If they are still interested after reading the more basic info, odds are they will read all three pages.