This question expects a negative answer to make the point that there was no other nation like Israel. It can be translated as a statement. Alternate translation: "there is no nation on earth ... by great and awesome deeds." (See: [[rc://en/ta/man/jit/figs-rquestion]])
The implied information is that they were rescued from slavery. Alternate translation: "you rescued from slavery in Egypt" (See: [[rc://en/ta/man/jit/figs-explicit]])