Mathematical expressions can be given names in Maple. The name can be any sequence of lower and upper case letters and numerals (only in trailing positions). The definition operator is :=, as in the example:
> p1 := (x^2+y^2)^3;It is important to remember that = is not the assignment operator. An expression a=b is an equality which may be true, false, or unknown. It can be tested for its truth or falsity, or it can be solved for a value of a variable to make it true.