Oh mathematics, it's the usual thingy which we're taught in school lol, algebra, calculus and the sort.
I don't know about making a gender section like this it's just too difficult for me I guess lol.
Philosophy is a large subject, I guess, thinking is actually one of the most beautiful parts that I can think of, I love "thinking", as a whole, lol.
Yeah!! Nirvana is a place of perfect peace and happiness, like heaven.
A sum-up of Hinduism.. Hmm.. Actually it's veryyy huge, like you can't explain the Bible in a few words, right xd. I've read this History's article about it and it pretty much does explain it, ig you can have a go-through of it too
https://www.history.com/topics/religion/hinduism