When you type z=y^3/(x^2+y^2) into Google, something magical happens Posted by lisper on Thursday February 02, 2017 @12:01PM from the google.com dept. https://www.google.com/search?q=z%3Dy%5E3%2F%28x%5E2%2By%5E2%29&ie=utf-8&oe=utf-8 ( 16 comments | 39 points | on HN )
https://www.google.com/search?q=z%3Dsqrt(x%5E2%2By%5E2)*sin(...
https://www.google.com/search?q=5%20%2B%20(-sqrt(1-x%5E2-(y-...
https://www.google.com/search?q=100-3%2F%28sqrt%28x%5E2%2By%...
http://www.wolframalpha.com/input/?i=z%3Dy%5E3%2F(x%5E2%2By%...
I've been using Wolfram Alpha up until now for getting quick graphs, though using Google would certainly be faster.