Expand

Expand[expr] expands out products and positive integer powers in expr.

Examples

Expand a polynomial:

Expand[(x + y)^2]
(* x^2 + 2 x y + y^2 *)

Expand products:

Expand[(a + b)(c + d)]
(* a c + a d + b c + b d *)

Please visit the official Wolfram Language Reference for more details.