When you open a Maple worksheet you must execute it to get the variables defined. You can do this by stepping through the commands from the beginning, or by clicking on the execute all button on the toolbar which looks like this, !!!
Click on "File" and select "Print" from the menu.
Instead of trying to follow the numerous Help menus, try entering ?topic to go directly to the help page you want. For example, to get help with the int (integration command), enter
at the Maple prompt. You will working examples for each command at the bottom of the help page for the command.
Maple's syntax is very intuitive and not complicated. The best way to learn how to use Maple is to take The New User's Tour . The New User's Tour presents the fundamental Maple commands that every user should be aware of. The tour covers many areas of Maple, including: The Maple Worksheet Environment, Numerical Calculations, Algebraic Computations, Graphics, Calculus, Differential Equations, Linear Algebra, Finance and Statistics, Programming, and Online Help. The tour is easy to proceed through, and it can take up to two hours if all topics are examined.
In order to start The New User's Tour you should go to Help --> New User's Tour .