Explanation: [He brings birds] due to Safek Metzora Muchlat, and Chatas ha'Of for Safek Nazir Tamei, and Olas ha'Of for Safek Nazir Tahor.

Question: Why doesn't he bring Olas ha'Of, like the law of Nazir Tamei?

Answer: Perhaps [Chachamim] did not obligate him to bring it amidst Safek.

Support: We must say so regarding Shelamim of Nazir Tahor. They did not obligate him, for they obligated for Safek Nazir Tahor only a Korban to permit shaving, like we say that if he shaved on one of the three, he was Yotzei. (Birkas Rosh - this is like we conclude, that our Mishnah is like R. Shimon, who allows stipulating about Asham. Rabanan forbid bringing Shelamim on Tenai, lest the stringencies of Shalmei Nazir cause it to become Nosar.)

Citation of Gemara: At the second [shaving], he brings Chatas ha'Of.

Explanation: This is not due to [Safek] Nazir Tamei, for there is no Safek that the second shaving is for Nazir Tamei. Rather, it is due to Safek Muchlat.

He brings also Olas Behemah, lest he was not Muchlat, rather, just a Nazir Tamei.

Explanation (cont.): At the third [shaving], he brings Chatas ha'Of, for perhaps he was Tamei, and the shaving[s] of Muchlat do not count for a Nazir Tahor, and not for a Nazir Tamei, like it explains below (60b);

He brings Olas Behemah, for perhaps he was Muchlat, but he was not Tamei [Mes].

Explanation: [He may eat Kodshim] on day eight. "After" is not precise, for the first day of his Nezirus he shaves due to Muchlat, "va'Yashav mi'Chutz l'Ahalo Shivas Yamim", and "va'Yom ha'Shevi'i Yegalach";

On the eighth day he brings Korbanos Metzora, and that day he may eat Kodshim.

Explanation (cont.): Now, if he was Vadai Tamei, he would count seven days, receive Haza'ah on days three and seven, and shave on day seven;

Note: Why did Tosfos mention Haza'ah? In any case he must wait seven days, for less than this amount of growth is not called Gilu'ach! Perhaps Tosfos teaches that he cannot receive Haza'ah until after Yemei Sifro. This is like Tosfos ha'Rosh Yevamos 71b DH Arel (for also in Yemei Sifro he has Tum'as Ohel, like a Mes - Bava Basra 9b), and unlike the Rambam (Hilchos Nezirus 10:12). However, if so, "he may eat Kodshim after (or on) day eight" is misleading. He must wait at least four more days to receive Haza'ah twice! With difficulty, Tosfos ha'Rosh can say that "Kodshim" refers to Pesach ha'Ba b'Tum'ah, which a Tamei Mes may eat. However, Tosfos explained that he may eat Kodshim on day eight, after bringing Korbanos. Pesach is eaten only at night! Perhaps he means that he is proper to eat Kodshim, i.e. Pesach ha'Ba b'Tum'ah, and therefore he may enter the Azarah on that day to offer it. This requires investigation.

However, since now he has a Safek, that perhaps he was not Tamei [Mes], rather, Tahor [and] Muchlat, therefore he cannot shave within 30 days. Perhaps he was not Tamei, and the Torah said "Ta'ar Lo Ya'avor Al Rosho Ad Melos"!

Therefore, he counts 30 days, and day eight counts for him. On day 31 [of his count] he shaves, like any Nazir, who shaves on day 31, like it says above (5b).

On day 38 he shaves the third time. And, perhaps he was a Nazir Tamei and the first days were cancelled, so he must count another 30 days. On day 31 [of this count, which is day 68 from the beginning] he shaves Tiglachas Nazir Tahor;

This is why it says that he drinks wine and may become Tamei Mes after 67 days, i.e. day 68.

Summation: This is the general rule. One cannot do the law of Nezirus Tum'ah, and not Nezirus Taharah, until the days of Muchlat finish;

He is not called Mechusar Kipurim to be forbidden Kodshim [for being a Nazir Tamei], only for being a Muchlat, whose Tum'ah is from his body.

Explanation: Since he is not a Vadai Muchlat, he cannot shave at all until after seven days, after Haza'ah on days three and seven. He shaves on day seven, and on the eighth day brings Korban Chatas ha'Of, like a Nazir Tamei;

He cannot shave again until 30 days, for perhaps he was not Muchlat. The eighth day counts towards his count of 30, and on day 30 (day 37 from the beginning) he shaves. Perhaps he was Muchlat, and these two shavings were for Muchlat;

This is why it says that he may eat Kodshim after 37 days, i.e. on day 38.

Explanation (cont.): At the end of seven days he shaves the third time, like the law of Nazir Tamei. Day 38 counts towards the count of seven days. On day eight (45 from the beginning) he begins to count Nezirus Taharah 30 days. On day 31, he shaves Tiglachas Nazir Tahor;

This is why it says that he may drink wine and become Tamei after 74, i.e. on day 75.

Explanation: Since he is Muchlat Vadai, he shaves the first day of his Nezirus, and [also] on day seven he shaves. On day eight he brings Korbanos Metzora. That same day he may eat Kodshim;

"After eight days" is not precise, rather, on day eight itself [he may eat Kodshim]. Because he is Tamei, he counts seven days including day eight of Chaluto;

On day seven (14 from the beginning) he shaves, and on day eight he brings Korbanos Tum'ah and begins to count Nezirus Taharah 30 days, including day eight.

On day 31 he shaves and brings Korbanos Taharah.

This is why it says that he may drink wine and become Tamei after 44 days, i.e. on day 45.

Explanation: A Nazir [shaves] to totally remove the hair. He does not need the hair to grow again for any Mitzvah;

However, the first Tiglachas of a Metzora is to grow hair and shave it again, before the day of bringing Korbanos. Since they are different from each other, one cannot exempt the other.

Citation of Gemara: Why shouldn't it count for him [Tiglachas at the end of] Yemei Sifro?!

Explanation: This is said in astonishment. I.e. the second shaving of a Metzora, which is also to remove, why doesn't it count for him for Tiglachas Nezirus Taharah?

He told them "this is before Zerikah", i.e. Tiglachas Metzora, about which it says "va'Yom ha'Shevi'i Yegalach... v'Rachatz Besaro ba'Mayim v'Taher; uva'Yom ha'Shemini Yikach Shnei Kevasim Bnei Shanah";

And this, i.e. Tiglachas Nazir, is after Zerikah, like it says "v'Gilach ha'Nazir Pesach Ohel Mo'ed v'Lakach Se'ar Rosh Nizro v'Nasan Al ha'Esh Asher Tachas Zevach ha'Shelamim."

Explanation: All of them are for a Mitzvah, and they require a razor, even for the third, and even if he was Tamei [Mes] Vadai and Muchlat Vadai, that he needs four shavings, and the third is only for Nazir Tamei.

It seems to me that this does not refer to the four shavings of our Mishnah, which discusses a Safek Muchlat and Safek Tamei [Mes], for in our Mishnah, there is no shaving in which we have no Safek that he is a Muchlat or a Nazir Tahor;

Surely, a Metzora and a Nazir Tahor, we learned from verses (41a) that they require a razor;

Also a Nazir Tamei, we learn from a Nazir Tahor. The Gemara concludes like this. Rami bar Chama was unsure.

Implied question: He could have asked about concisely, "does Tiglachas Nazir Tamei require a razor, or does it not require a razor?"!

Answer: He mentioned "these shavings" because we discuss them in our Sugya, regarding a Muchlat Vadai and Tamei Vadai, that he shaves four times.

Citation of Gemara: If you will say that it is merely to remove hair, even anointing with Nasha (suffices to remove hair).

Explanation: You must say that [he would anoint most places with Nasha, and] shave some hair with a scissors or razor;

If he anointed his entire head with Nasha, the hair would not grow back, like it says in Bava Kama (86a), and then he could not fulfill Tiglachas Taharah afterwards!

Observation: Alternatively, [Rami bar Chama] could have asked whether he may shave with a scissors.