I have a couple of desktop shortcuts in chrome that open multiple web pages. Each shortcut is written in the form "name of Chrome exe file" [URL of RC] [URL of aol]
There are quotes around the Chrome file name. There are no brackets, nor commas, with the URLs I want to open. There's just a space then a URL complete with http:// for each site. On another laptop I have five such URLs that open together. (Oddly, my other laptop and my desktop both require -newtab- or something like that. I'll correct that when I can.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw