Hello dear, 

I am providing you the list of best colleges for mathematics and computer engineering -

FOR MATHS-

1 MIT, USA

2 HARVARD UNIVERSITY 

3 PRINCETON UNIVERSITY 

4 UNIVERSITY OF CALIFORNIA, BERKLEY

5 UNIVERSITY OF OXFORD, USA

FOR COMPUTER

1 BITS PILANI

2 DTU

3 BIT MESRA

4 VIT VELLORE 

5 JADAVPUR UNIVERSITY.

hope this helps you. 

Good luck 

Hello aspirant..
Apart from IITs and NITs, there are many prestigious engineering colleges in India forpersuing computer science engineering or mathematics.

The most important of them according to rankings are :-

Birla Institute of Technology and Science, Pilani

. Jadavpur University, Kolkata

. Delhi Technological University, New Delhi
. International Institute of Information Technology, Hyderabad(CSE)
. Indian Institute of Information and Technology, Allahabad
.BIrla institute of technology,Mesra
Hope it helps you.
Best of luck.

Hii
You can check the list of the colleges below



Delhi Technological University, Delhi

International Institute of Information Technology, Hyderabad

VIT University, Vellore

Birla Institute of Technology and Science, Pilani

Manipal Institute of Technology, Manipal

Thapar University, Patiala



Good Luck!!

Hello aspirant

As per your question, other than IITs and Nits, there are:
Vellore Institute of Technology, Chennai.
Delhi Technological University, New Delhi.
Birla Insitute of Technology and Science, Pilani/Mesra.
Sri Ramaswamy Memorial University, Multiple Locations.
Maharashtra Institute of Technology, Pune.
Punjab Engineering College, Chandigarh.

Some of the universities from where you can pursue your graduation in mathematics are:

Indian Statistical Institute, Multiple Locations.
Indian Institute of Science, Bangalore.
St. Stephens College, New Delhi.
Tata Institute of Fundamental Research, Multiple Locations.
St. Xaviers College, Mumbai.
Christ University, Bangalore.

Hope this information is relevant to your question.

Thank you:)