Simplify

Simplify[expr] performs algebraic transformations on expr and returns the simplest form it finds.

Simplify[expr, assum] simplifies using assumptions.

Examples

Simplify expressions:

Simplify[x^2 - 1 - (x - 1)(x + 1)]
(* 0 *)

With assumptions:

Simplify[Sqrt[x^2], x > 0]
(* x *)

Please visit the official Wolfram Language Reference for more details.