If you are talking about it as a field of study you would capitalize it, but if you say I study math in general then not capitalized
Yes you do capitalize Math because the word Math is a Proper noun
No.
No it shouldn't be capitalized.
do you capitalize the word protestant
No it shouldn't be capitalized.
It is not necessary to capitalize the word "yo".
No, you do not capitalize the word drama.
No, you do not capitalize bachelor's degree in this sense.
Yes, you must capitalize the first word, UNLESS it is a small word, such as "It" or "A" or "The".
Unless "it's" is the first word, there is no need to capitalize.
No, you do not capitalize the second word in the complimentary closing.
You would never capitalize a word because of the comma. Onlt capitalize it if it's a word that is always capitalized like France, I, Tuesday or Frederick.