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(3) Q&A (I do not provide solutions to HW, quizzes, or exams on my site. However, I may provide in-depth lessons on problems if they are clearly not a quiz/test problem—if time permits)
(4) All formula, prep-course, and study-guide eBooks, ...
(5) In-site ad-removal
It should be clear that the main purpose for registering is (1) for my study-guide(s) and (2) to ask me general questions related to the material in the study-guide(s).
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