Must Terumah be brought to Lishkos Beis Hashem?
Rashi: No. The verse says that we will bring to there, for Kohanim were regularly there.
What do we learn from "ha'Me'asrim b'Chol Arei Avodaseinu"?
Rashi: Leviyim receive Ma'aser in all cities of Yisrael. Malbim - it is wherever people work in the field.
Does the verse teach together Torah obligations and Mitzvos mid'Rabanan?
Malbim: Our verse favors the Rambam, who says that in the days of Ezra, the Torah exempted from Chalah, Terumah and Ma'aser; they accepted all these on themselves. The Ra'avad holds that Terumah and Ma'aser of grain, wine and oil was mid'Oraisa, but Chalah, and Terumos and Ma'aseros of other matters, were mid'Rabanan.
