Quote:
Originally Posted by Saira khattak
Can any mortal help me with this portion?
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I am aspirant and teacher as well. I have gripped the portion by teaching it to the students of various classes. I don't think so any video channel is of your help in this regard. Be specific to every topic which consists of few of the formulae only those can let you easily get 100% of the portion. You will get puzzled by videos and other lectures. This is my perception. If you need work sheets or related material than I may help you.