Сложение двух чисел, составляющих вместе с разделяющим их пробелом одну строку

@echo off
if not exist C:\Users\Corvette\Desktop\Number.txt (@echo file not found) else (goto n1
:n1
@echo Open file C:\Users\Corvette\Desktop\Number.txt
for /F "eol"=; tokens=1,2*delims=, " in (C:\Number.txt) do 
(@echo %i %j %k
%i>>C:\2.txt
%j>>C:\2.txt
%k=%i+%j
%k>>C:\2.txt
taskkill /im notepad.exe
)
@pause

SETLOCAL ENABLEDELAYEDEXPANSION
for /F "tokens=1,2 delims= " %%i in (C:\Users\Corvette\Desktop\Number.txt) do (
>C:\2.txt echo %%i
>>C:\2.txt echo %%j
set /a k=%%i+%%j
>>C:\2.txt echo !k!
goto next)
:next

setlocal enabledelayedexpansion
 set q=0
 for /F «delims= » %%i in (C:\Users\Corvette\Desktop\Number.txt) do (
 set /a q+=1
 if q=="" (@echo пустая строка) else
(
for /F "tokens=1,2 delims= " %%i in (C:\Users\Corvette\Desktop\Number.txt) do (
>C:\2.txt echo %%i
>>C:\2.txt echo %%j
set /a k=%%i+%%j
>>C:\2.txt echo !k!
)))

SETLOCAL ENABLEDELAYEDEXPANSION
if exist C:\2.txt del /f /q C:\2.txt
for /F "tokens=1,2 delims= " %%i in (C:\Users\Corvette\Desktop\Number.txt) do (
set /a k=%%i+%%j
>>C:\2.txt echo %%i %%j !k!)