d d d, in in in, d d d, in in in, what's the point? Being able to do such questions prove that you don't need mathematica, and nothing else. For sure it is no indications that you can be a physicist. Examinations suck.
I understand the ideal case lu~~ but I don't think I can deal with the mathematics when there are losses, especially during examinations when the mind is usually poorer.
4 questions in 2 hours?? I doubt if I can even complete 1 of them. Maybe just write down all the initial steps and then do nothing. This way, the score will definitely be higher, and I will be saved from those crazy computations.

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