Hi Hemanthsagar! Let me just list down the weight ages for you for maths chapters:

First and the most important topic in maths is differential calculus, it's definitely hard but it consists of 3% of questions out of 80 math questions

Second is, probability which consists of 15% of the questions out of 80 math questions. Do mainly focus on permutations and combinations.

Coming to third, vectors which has a weight age of 10%

Fourth, integral calculas which carries the same weight age as differential calculas does i.e 3% 

And last is calculas, which carries 6% of the weight age out of 80 questions.

My suggestion is just remember the formulas and especially try to solve more and more problems as they say "maths is less how much ever you solve" so find shotcuta to remember the concepts and the formulas.

All the best!