This has been a good notebook and the math doesn't hurt it at all.  3 months of evernote premium plus a notebook for under $20 is an excellent deal.  The size is a bit smaller than I expected but very usable.  I will probably buy another couple instead of just paying the evernote premium fee. So far I am happy with the evernote program as well.  I use it on iPad and iPhone.  The stickers are OK but I was hoping for maybe QR codes (reading this Evernote?)  The stickers are not important once digitized anyway.  I will update after I get fully literate in the Evernote part of this product.