1. They are the students of our school.

2. They are all the students of our school.
[Is #1 the same as #2?]

3. They are students of our school.
4. They are some of the students of our school.
[Is #3 the same as #4? In #3 'the' is missing. We can see 'the' in #1.]

5. They are the students whom I like.
6. The are all the students whom I like.
[Are both the same?]

7. They are students whom I like.
8. They are some of the students whom
I like.
[Are both the same as well?]

1. They are the students of our school.

2. They are all the students of our school.
[Is #1 the same as #2?] Yes. However, I'd use "at" instead of "of" in these sentences.

3. They are students of our school.
4. They are some of the students of our school.
[Is #3 the same as #4? In #3 'the' is missing. We can see 'the' in #1.]
Yes, but again, I'd use "at" instead of "of" in these sentences.

5. They are the students whom I like.
6. The are all the students whom I like.
[Are both the same?]
These two do not necessarily have identical meanings.

7. They are students whom I like.
8. They are some of the students whom
I like.
[Are both the same as well?]
Not necessarily.

It all depends on context!

1. Yes, #1 and #2 have the same meaning. In both cases, "they" refers to the students of our school. The difference is that #1 implies that there may be other students in the school, whereas #2 suggests that all the students in the school are being referred to.

3. Yes, #3 and #4 have similar meanings. Both sentences convey that "they" are students of our school. However, #4 implies that there are other students in the school who are not mentioned in the sentence, whereas #3 does not specify whether there are other students or not. In both sentences, the word "the" is not necessary and does not change the meaning significantly.

5. No, #5 and #6 do not have the same meaning. In #5, "they" refers to some students whom the speaker likes, while #6 suggests that all the students the speaker likes are being referred to.

7. Yes, #7 and #8 are similar. Both sentences convey that "they" are students whom the speaker likes. However, #8 implies that there are other students whom the speaker may or may not like, whereas #7 does not specify whether there are other students or not. In both sentences, the word "the" is not necessary and does not change the meaning significantly.