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: operatorp (<expr>, <op>)
Function: operatorp (<expr>, [<op_1>, ..., <op_n>]) operatorp (<expr>, <op>) returns true if <op> is equal to the operator of <expr>.
operatorp (<expr>, [<op_1>, ..., <op_n>]) returns true if some element <op_1>, ..., <op_n> is equal to the operator of <expr>.
(%o1) true (%i2)