Wolfram Alpha computes answers rather than just searching the web. You can type a question in plain language or as maths input, and it works out a result using Wolfram's algorithms and built-in knowledge.
It covers algebra, calculus, statistics, physics, chemistry, engineering, units, history, geography, finance, nutrition and much more. Step-by-step maths solutions make it especially popular with students. Much of it is free to use, with extra features in a paid plan.
