Examples:

1. w + 3
subs(w=x^2+4*x,%)
subs(x=4,%)
   

   Comment: Note that the commands do not have names assigned. In the second command, the % refers to the result of the first command, but in the third command the % refers to the result of the second command. Thus % acts like a name, but it refers to the result of the command that was just previously executed.

2. ? subs
   

   Comment: The ? command will invoke the on-line documentation for whatever command that follows it.

3. a1 := exp(-h*v/(k*T))
a1
restart
a1
   

   Comment: After restart is typed, Maple forgets about the name a1 and what it represents.

4. a1 := sin(omega*t)
b1 := cos(omega*t):
c1 := a1^2 + b1^2
   

   Comment: The first command is echoed to the screen in blue, but the second is not because a : was appended to the end. Yet the third command shows that the second command was remembered by Maple.