Completing Syllabus ( Science )

Guys... Just a few days away from boards, sooo like if I pull all nighters till boards can I complete the syllabus, like it's completed but I am not just confident enough to answer questions and forget the concepts 🥲 then mess up everything. Any suggestion on how to complete maths and physics atleast don't care about chemistry coz it's shit either way and out of my best of 4... ALL SUGGESTIONS ARE APPRECIATED !!!