protected ExpressionCalculator(OperactionService operationService) { _operationService = operationService; }
protected ArifmeticExpressionConverter(OperactionService operationService) { _operationService = operationService; }
protected ExpressionCalculator(OperactionService operationService) { _operationService = operationService; }
protected ArifmeticExpressionConverter(OperactionService operationService) { _operationService = operationService; }