In some of the SWAPS questions, they ask to show how the swaps work. Is it necessary to show the workings of swaps or is the calculation of Net Result (the way you taught in the free lectures) enough?
If the question just asks for the result of swapping then the end result is all that is needed. If it asks you to show how the swap will be arranged then you do need to show the workings (although if you are running short of time, then a written description of the idea (without the workings) would be enough to get you at least the 50% you are aiming for in everything)).