How does Hashem tell the end from the beginning?
Rashi: The exile in Egypt and its redemption, I informed about it at Bris Bein ha'Besarim, before it was.
Radak: All these future events, I told before they came
Why does it say "umi'Kedem Asher Lo Na'asu"?
Malbim: Other acts of Hashem are above natural law, and do not depend on causes. Also these He tells beforehand. Refer to 46:10:4:2.
What is the significance of "Omer Atzasi Sakum"?
Radak: I say, and do My counsel that I said will rise, and no one can annul it.
Malbim: The counsel that I made to conduct the world based on laws that I fixed, I say that they will be fulfilled.
Why does it add "v'Chol Cheftzi E'eseh"?
Radak: The matter is repeated in different words.
Malbim: I do as I want