Hrefna (DHC)Absolutely.
When I was in school my Calc III prof said "do not get rid of your calculus textbook (Stewart's). Others, sure, absolutely. But you will find that you regret giving up your calculus textbook."
It has traveled with me through multiple moves, the spine is basically destroyed from how much I have used the book over the last two+ decades, but I still have it and it is still worth keeping.
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