So, if you have a question, the first thing most people do nowadays is pull out their phone and Google it. Which is great for times when you need to find out who the replacement drummer in some 80s hair band was but maybe not so great when you’re trying to find the solution to complex math. Wolfram Alpha is the search engine for people who need answers beyond pop culture.
The goal of this engine is to make expert-level knowledge accessible to everyone from anywhere. Where your general search engines give you a list of sites that will likely lead you to the answer to your question, Wolfram gives you one page that gives you all possible relevant knowledge regarding your question.
Because of the nature of this engine, it’s best used when you have a very specific question about a very specific thing. The site works quickly and gives you only answers that can be verified. No urban legends, myths, or otherwise. The site has both a free and paid option. The pro version is $5.49 a month.
I find Wolfram pretty much useless. If you want technical answers, just append “wiki” to your google or bing searches. Wikipedia is excellent math and science reference.
For math and science you can usually find answers to most questions using wiki and the like but I found this site to be a lot of fun to browse more creative disciplines.