only maths is there in BSc maths ?

Hii!
Sorry, but your question is quite unclear. If you want to enquire about the curriculum if you choose BSC maths as a subject in your graduation, then let me tell you that in the initial two years, you will have other subjects too, along with maths as per the choice options provided by the respective college. Then in the third year, you will be totally focused towards maths and it's different disciplines. This curriculum is followed all across indian university except some autonomous universities to say.
Hope this helps.
Good luck!