Online Algebra Calculator
Many of users do not use powerful Maxima computer algebra system for systematic work, but for ad hoc algebraic calculations – equations, functions, matrixes, etc. only. To do this job, it is not useful to download the whole application from a web site.
Function: letsimp (<expr>)

Function: letsimp (<expr>, <package_name>)
Function: letsimp (<expr>, <package_name_1>, ..., <package_name_n>) Repeatedly applies the substitution rules defined by let until no further change is made to <expr>.
letsimp (<expr>) uses the rules from current_let_rule_package.
letsimp (<expr>, <package_name>) uses the rules from <package_name> without changing current_let_rule_package.
letsimp (<expr>, <package_name_1>, ..., <package_name_n>) is equivalent to letsimp (<expr>, <package_name_1>, followed by
letsimp (%, <package_name_2>), and so on.(%o1) true (%i2)