> x+z; x + z > " ^ 6; 6 (x + z)Notice the double quote mark ("). It always stands for the

Continuing the example:

> expand( " ); 6 5 4 2 3 3 2 4 5 6 x + 6 x z + 15 x z + 20 x z + 15 x z + 6 x z + z

The built-in function

Conversely, Maple knows how to *factor* algebraic expressions:

> factor("); 6 (x + z)

Another useful function that can be applied to any expression is `simplify()`,
which applies various known algebraic and trig identities to try and simplify an
expression:

> sin(x)^2 + 3 * cos(x)^2; 2 2 sin(x) + 3 cos(x) > simplify("); 2 2 cos(x) + 1

Keith Orpen, who is still writing this, would like to hear your comments and suggestions.