Explanation of Ramban 34:7, 34:13, 48:22 - a wide-ranging debate between Rambam and Ramban as to Shimon and Levi's justification for killing the men of Shechem and why Yaakov was upset with them, and what the seven Noahide laws are.

Explanation of Ramban 28:12, 32:3, 35:18 - what was the message of Yaakov's dream? Why were the angels going up and only afterwards down? Discussion of three approaches: Rashi - the dream is about angels who serve Yaakov; Ramban/Ibn Ezra - it's a message about the total power of God; Rambam - the dream teaches philosophocal lessons

Explanation of Ramban 25:34 - the debate between Ibn Ezra versus Ramban and Rashi as to whether Yitzchak was rich or poor

Explanation of Ramban - 1) 23:2 - debate between Rashi and Ramban where Avraham was living when Akedat Yitzchak happened, and whether Sarah died because of the Akedah (and how old Yitzchak was at the Akeda), 2) 24:62 - where Avraham lived after Sarah's death and who he married

Explanation of Ramban 18:1, 18:3 - Debate between Rambam and Ramban whether the angels appeared in physical form or in a prophecy, and debate between Rashi and Ramban whether Avraham knew they were angels or was fooled that they were people 

Explanation of Ramban 11:28, 11:32, 12:1, 12:2 - debate between Rashi/Ibn Ezra versus Ramban where Avraham was born, debate between Rashi/Ramban versus Ibn Ezra where he got commanded 'Lech Lecha', and debate between Ramban and Maharal why Avraham was the one chosen

Explanation of Ramban - 1) 6:10, 9:18, 10:21 - debate between Rashi, Ibn Ezra and Ramban about the birth order of Noach's sons and debate between Rashi/Ramban/Rav Saadia Gaon versus Ibn Ezra about who defiled Noach (Cham or Canaan) and 2) 9:26 - Ibn Ezra and Ramban on the curse of Canaan.

What was the 'tree of life' mentioned in the Torah alongside the 'tree of knowledge'?

Explanation of Ramban - 1) 5:4 - Debate between Rambam and Ramban whether all ancient people lived very long or only a few exceptions 2) 6:4 - Debate between Rashi, Ibn Ezra and Ramban as to who were the 'sons of God'

Explanation of Ramban - 1) 1:1 - debate between Rashi and Ramban how to read the first verse of the Torah and what was the first thing created 2) 2:17 - debate between Rambam and Ramban whether death is a result of physical decay or Adam's sin