1)
What is "Yechaltzun"?
1.
Rashi: They will be saved from evil.
2.
Malbim: They will send soldiers to fight the enemy.
2)
Why did he say "Hoshi'ah Yeminecha"?
1.
Rashi: [You had drawn Your right hand back] when their enemies overpowered them.
2.
Radak: The enemy thinks that Your right hand cannot save us from them, as if Your right hand is afflicted with us. (Show to them that they err!)
3.
Malbim: Save us via a miracle, which is attributed to "Yemin Hashem Osah Chayil" (118:16).
3)
David asks Hashem to save Yisrael. Why did he say "Aneni" (singular)?
1.
Rashi: If You will answer me, I will fight for them, and they will be saved.