Maple 9 Learning Guide - Maplesoft

40 • Chapter 2: Mathematics with Maple: The Basics3> denom(1/(1 + x));x + 1The nops and op CommandsThese two commands are useful for breaking expressions into parts andextracting subexpressions.The nops command returns the number of parts in an expression.> nops(x^2);2> nops(x + y + z);3The op command allows you to access the parts of an expression. Itreturns the parts as a sequence.> op(x^2);x, 2You can also specify items by number or range.> op(1, x^2);x> op(2, x^2);2> op(2..-2, x+y+z+w);y, z