Hello aspirant

You are not clear about your self. You want to appear for kcet and NEET also.  You failed in maths in JEE last year. Now it depends upon you how you have prepared. If You  can cope   with both NEET and cet , go ahead .you   know  hard work  is to be done for NEET .

For engineering you just have to appear for cet, even if you get less marks in cet , you can get any engineering stream IT or CS on basis of your marks but for any medical course you will have to score good marks in neet.