I already dropped Google for just about everything and after the email data mining revelation, I suggested dropping gmail to several family members and friends. Using Yahoo for search isn't that bad and I only occasionally use Google maps when something doesn't work in Apple Maps. I got rid of my gmail account months ago and am glad I did. gmail had all sorts of problems for me when managing email using Apple Mail (go ahead and say it way Apple Mail's fault, I don't care, I'm not going back). As for using Google for calculations, I just use the Calculator widget. It works fine for me.
btw: @paxmantry this in Safari when Yahoo is your search engine. It works
I don't own Yahoo stock but do own Apple stock.
Thanks for posting. I have been using Bing to stay away from Google and was missing those features. I had heard that Yahoo was using Bing as the backend, but didn't even consider they could have added this stuff on top of it.