Is there a way to activate a key combination w/ applescript

I am just wondering if there is a way to have applescript invoke a key combination
like command +3 for example.
I know this can be done in quickeys but can it be done in applescript?
If someone could show me how to do it I would very very much appreciate it.

I have had success with the TypeText command in the SÄNDI’S Additions OSAXen

The command for command+3 would be

TypeText "3" Command true

The OSAXen is available at

Good Luck