Explanation of Ramban - 1:9 - debate between Rambam vs. Ramban what the reason for animal sacrifice is.

Explanation of Ramban - 7:16 - about Ramban's halachic innovation that even Korban meat which can be eaten for 2 days, there's a mitzva to eat it on the first day specifically. And the Chacham Tzvi's extension of this to the Chagiga of the Seder, that must be able to be eaten on Erev Pesach

Explanation of Ramban - 40:2, 40:17, Vayikra 8:2 - debate between Rashi/Ramban vs. Ibn Ezra what date the Mishkan was inaugurated, and debate between Rashi vs. Ibn Ezra/Ramban when Shemos ch. 40 happened

Explanation of Ramban - 31:13, 35:2 - debate between Rashi and Ramban how we know it's forbidden to build the Mishkan on Shabbos, and Meshech Chochma's explanation as to why in Ki Tisa the Mishkan precedes Shabbos, and in Vayakhel it's reversed.

Explanation of Ramban - 32:1, 32:4, 32:5, 32:6, 32:21, 32:22 - reconstruction of the views of Rashi, Ibn Ezra and Ramban about what the sin of the golden calf was and what Ahron's role in it was.

Explanation of Ramban - 33:7, 34:28 - debate between Rashi/Tosafos versus Ramban/Vilna Gaon whether Moshe lived in Heaven two or three times, and discussion of the Vilna Gaon's revolutionary view of what Yom Kippur celebrates.

Explanation of Ramban - 28:2, 28:31, 39:24, 39:28 - debates between Rashi vs. Rambam vs Ramban and other commentators about the specific details of the Kohen Gadol's cloak and hat.

Introduction to Rashi's commentary on Shir Hashirim, versus Rambam's approach, and the question of why Shir Hashirim is connected to Pesach.