1)
Why is Hashem called "Oseh Fele"?
1.
Radak: You have true ability. You did wonders in Ma'amad Har Sinai.
2.
Malbim: You change the fixed laws, due to [people] with choice.
2)
How did Hashem make His might known to the nations?
1.
Radak: [Via miracles] for Yisrael in Egypt and in [the war against] the kings of Kena'an.
2.
Malbim: The nations, who attribute everything to nature, recognize Your might via wonders, that You can override nature.