I wonder if this might help?

https://en.wikipedia.org/wiki/Google_Search

1. ^ Jump up to: ^{a b} "Google changes the operators". Frag.co.uk.  Cite error: Invalid tag; name "Google_changes_the_operators" defined multiple times with different content (see the help page).

http://www.frag.co.uk/blog/2011/10/googles-changes-the-operators/

what about the following?

plus operator overloading in c++....or css?....or sql?