Has anyone been able to completely understand all the workings done in the article? I have a calculus and linear algebra background but I still can’t completely understand all the workings in the article. Should i try again or move on? 
Hello, @Sami_Ullah5,
Which reading? This? " Clarification For: What does this have to do with the brain?"?
If so, I would recommend you to just take away the formulae as is and then move on.
Cheers,
Raymond
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The one on feed forward neural networks in depth
That reading links to this forum thread, correct?
Do you have specific questions?
Otherwise I recommend you accept those derivations as fact and move on through the course.