Should I send SAT Subject Scores?

Should I send 2 SAT II tests if they are highly recommended?

My two best are: Math II --> 740 Physics–> 650

My ACT and other scores are nothing like this. I just got unlucky (I have a 34)

If schools “highly recommend” the SAT Subject Tests, should I submit two, one, or none?

If schools don’t require them, but say that they’re optional, should I still send in my math II?

Thanks a lot guys!