def Ariphmetical(Ind):
	(newInd, Composite, err) = is_Composite_Ariphmetical(Ind)
	if (Composite):
		return (newInd, True, True)
	(newInd, Operand, err) = is_Operand(Ind)
	if (Operand):
		return (newInd, True, True)
	print ("Не является арифметическим выражением")
	return (Ind, False, False)
def is_Composite_Ariphmetical(Ind):
	StartInd = Ind
	try:
		StartInd = Ind
		(newInd, Operand, err) = is_Operand(Ind)
		if Operand:
			Ind=newInd
			if (Ind>=len(Lexems)):
				return (StartInd, False, False)
		else:
			return (StartInd, False, False)
		(typing, i)=Lexems[Ind]
		if (typing[i]) == '+' or (typing[i]) == '-':
			Ind=Ind+1
			if (Ind>=len(Lexems)):
				return (StartInd, False, False)
		else:
			return (StartInd, False, False)
		(newInd, Operand, err) = is_Operand(Ind)
		if Operand:
			Ind=newInd
			if (Ind>len(Lexems)):
				return (StartInd, False, False)
		else:
			print("Ожидается второй аргумент арифметической операции")
			return (StartInd, False, False)
		return (Ind, True, True)
	except BaseException:
		return (StartInd, False, False)