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: plog (<x>) Represents the principal branch of the complex-valued natural logarithm with -%pi < carg(<x>) <= +%pi .

(%o1) true (%i2)