1)
Why does it say "Gam Edosecha"?
1.
Malbim: From the Edos, I knew that the Chukim always help. Via them Hashem heard our Tefilah and made Hashgachah Pratis cling to Yisrael, like it cling via Korbanos; also they are Chukim.
2)
What is "Sha'ashu'ai"?
1.
Rashi: My engagement.
3)
Who are "Anshei Atzasi"?
1.
Radak: They are my friends, and not the officers.
2.
Malbim: They are the Edos of the Torah. I always take counsel with them and do like their counsel. They teach to me the great power and Segulah of the Chukim.
