What are the implications of "le'Ish Acher"?
Rashi: It implies that the second man is not in the same league as the first one - since he took into his house the wicked woman that the first man sent away.
Where does he write th Get?
Targum Yonasan: In front of Beis-Din. 1
See Nos'ei K'lei Yonasan and Na'ar Yonasan. Note; Targum Yonasan does not say this in Pasuk 3, when the second husband divorces her.
Why does the Torah write "be'Yadah" - instead of 'lah'?
Torah Temimah (citing the Sifri): To teach us that it will suffice to place the Get in her domain 1 - such as on her roof or in her courtyard or enclosure, provided it is fenced in..
Torah Temimah: Just like her hand is in her domain.
What are the implications of "ve'Nasan b'Yadah"?
Torah Temimah (citing Gitin, 79a): It implies that the man must give his wife the Get
Why does the Torah write "be'Yadah" - instead of 'lah'?