> Let me summon then
Should be "Let me sum it up then."

> That is the summonned up version.
Should be "That is the summed up version." or even more correctly "That is the summarized version."

I point this out not because I am a grammar nazi, but because everyone I know who doesn't speak english as their first languauge usually like to know when they make a big mistake.

The words 'summon' and 'summarize' have very different meanings. One basically means to add or group together, the other to call on spirits or demons.