# Sage

#### Use Sage Online

- Go to sagemath.org and click on "Sage
Via the Web".
- You will need to make up a username and password.
- Once you have logged in, click on "new worksheet". Type "1+1" (without the quotes,
here and later in this explanation)
into a cell on the worksheet, then hit Shift-Enter. If everthing goes OK,
you should get "2".
- Now type "plot?". After a few seconds, you should see
more than you want to see about the plot function. I usually skip through
the documentation looking for examples. Try plotting something.
- Other keywords you might try: integrate?, diff?, solve?, limit?
- Try "expand(x+y)^5" and "factor(x^2+2*x*y+y^2)".

#### Sage Documentation

From the Sage homepage, click on "Help". I would recommend the
Quick Reference
Cards, Sage for
Newbies, and the Tutorial pages.
#### Download Sage

To download Sage, go to the Sage website and click on download. There is an
Installation Guide
available in the "Help" section of the Sage site.
#### Pointers

- To enter commands in the web version of Sage, enter "Shift-Enter".
- To multiply, use "*". Thus, the correct syntax for "2x+1" is "2*x+1".