How did Hashem take Yisrael?
Rashi: He took them for His portion. This is like "va'Yishlach Yado va'Yachazek Bo" (Shemos 4:4).
Radak: He will take them out of Galus. Past tense used in place of future; this is common in Nevu'ah.
Malbim: He chose them to be His servants.
What is "mi'Ketzos ha'Aretz"?
Rashi: From the other idolaters.
Radak: From the great people of the land.
Malbim: From all the residents of [even the ends of] the land, I took only you.
Who are "Atzileha"?
Rashi: The great people among them.
Radak: The kings.
Malbim: The esteemed people of the land.
What did Hashem call them?
Rashi: He called them for His portion - "Bni Bechori Yisrael" (Shemos 4:22).
Radak: He called them to leave the Reshus of the nations, and they will not have power to stop you.
What is the Chidush "v'Lo Me'asticha"?
Rashi: This is unlike Esav - "v'Es Esav Saneisi" (Mal'achi 1:3).
Radak: Even though I lengthened the Galus [I did not despise you].
Malbim: I chose you forever; I will never despise you.