Graph functions with Google Search

Try this:
- https://www.google.com/search?q=x/2,+(x/2)%5E2,+ln(x),+cos(pi*x/5)

If you don't think that's cool, then try 'good old' WolframAlpha:
- http://www.wolframalpha.com/input/?i=x%2F2%2C+(x%2F2)%5E2%2C+ln(x)%2C+cos(pi*x%2F5)

Enjoy!