1)
Why does it say "Terev Gedulasi"?
1.
Radak: Not only will You take us out of Galus - You will increase our grandeur more than it was before Galus!
2)
What is the meaning of "v'Sisov Tenachameni"?
1.
Radak: Turn to us, for in Galus, it is as if You turned Your face and distanced from us. Now, turn and console us from the pain of Galus.
2.
Malbim: The lowliness is a reason why You will turn - to console me.