Well, I would have loved to share my tons of eBooks on Math, Physix, Engineering, Anything 101... but with a crappy net connection I'm unable to do so. I face the same problem earlier and ended up looking for resources online. I didn't have the time then, to go through my school books.
So, what to do ?
First, take @
saswat23's suggestion (but that might take some time)
Second, you can go through the notes site that I mentioned earlier, they have only the relevant topics
Third, you can visit NPTEL, they have great resources but demand an hour's worth of your time (and its worth it)
Fourth, you can regularly visit this Math Forum to clear your doubts, but again, it will take time to learn (what doesn't)
[Bonus] Also, have fun with this from time to time
Besides, tech courses don't really require eloquent explanations to practical problems. You just need to solve them. That's the max that's expected. I don't know what sem you're taking exams for, but calc courses are usually taken upto 3rd sem or 4th sem at the max. I think you're in 6th sem or higher. Don't know much about CSE but in any case the links should work for you
I don't think you'll go through all the hassles as exams are already hanging on your head
Better speed read the topics then solve as much as you can to get the hang of it. It helps to have a buddy though. Get some previous years papers to have some idea about questions and start preparing
All the Best
EDIT: I forgot about this, another great math forum (doesn't require sign up)