TLDR - DuckDuckGo has great math related instant answers like this: https://duckduckgo.com/?q=x^2y''-20y...,%20y'(1)=.
Hi my name is Zaahir and I work at DuckDuckGo. We're a search engine with instant answers and real privacy. I've come to tell the good people of MathHelpForum (any web developers out there?) about our math related instant answers and we'd also love to hear any feedback you have. The "instant answer" is the box at the top of the page, above the links, that displays the answer and/or equation.
If you have any feedback (especially about improvements) please let us know on our forum. Usually these are open-sourced, but this one is still a WIP. Feel free to report any issues here though: https://github.com/duckduckgo/zeroclickinfo-spice.
Thanks everyone, happy searching