Should I send low GRE mathematics score to universities?
Many US universities are going to ask for the GRE results.  You probably won't be able to avoid having to send them.  Also, many schools pull the GRE data from ETS the testing service that administers the GRE.  That means even if you take the GRE a second time all of your GRE exams will likely be received by the university.  That is not meant to discourage you.  The program's admissions committee has final say on the matter and they look at other factors too.  If you are not good at exams, but good at applied work highlight that in your review process.  Good luck!!!