be not brain surgery

To not require an extreme level of intelligence, skill, or competence to do or accomplish. Just follow the directions as they're written—it isn't brain surgery. I know reformatting a computer hard drive isn't brain surgery or anything, but I just get so flustered when I have to deal with IT stuff like that! Sure, it took a little bit of time to figure out, but reinstalling the modem wasn't brain surgery or anything.