I'm a little confused. Is what you're having trouble with the pattern line or the 5 and 7 row part? That just means you repeat the line when it's time to do rows 5 and 7.
If you mean the pattern line m1 is in the glossary http://www.knittinghelp.com/videos/knitting-glossary
The only other problem I can think that you're having is the ()? That means to repeat what's in there 6 times.
OK. I hope it was one of those.