simplify method

  1. @override
Expression simplify()
override

Possible simplifications:

  1. ln(1) = 0

Implementation

@override
Expression simplify() {
  final Expression argSimpl = arg.simplify();

  if (_isNumber(argSimpl, 1)) {
    return Number(0); // ln(1) = 0
  }

  return Ln(argSimpl);
}