1)
What is the meaning of "Al Yashov Dach Nichlam"?
1.
Rashi: Yisrael (Radak - in Galus) should not return crushed in front of You, ashamed in their prayer 1 .
2.
Malbim: It is proper that You save one who hopes to You, so the crushed will not be ashamed.
1
If it is not answered. (PF)
2)
Why does it say "Oni v'Evyon Yehalelu Shemecha"?
1.
Radak #1: [Yisrael] praise Your name in their Galus.
2.
Radak #2: When the Oni is not returned embarrassed in front of You (for You answer him), he will praise Your name.
3.
Malbim: [It is proper that You save one who hopes to You,] so the poor will praise Your name, that You save those who hope to You, and hear the poor.
