How to complete 3 sub in 10 days?

I have given more than 5 attempts. I have read before all material. I now have 3 sub to clear and 10 days. I was ill from last week due to which i got distracted. Due to medicines I am sleeping a lot. I want to do smart work now. But have no plan and so depressed. I did hard work but now i want to clear anyhow. I solve sums without seeing but one step gets wrong in each. I don't know why that happens? Plz guide me how to do and what all to do at this time. I mean what all material to study? Sub are cost/fm, tax, itsm. I have 5 days holiday for itsm. Plz guide. Thank you.