https://mathweb.ru/allsystem.html?id=128148

вычесть 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000(5) и 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000(5) = 4444444444400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 Столбиком

Введите два числа и укажите их основание системы счиления:
...........
-10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
04444444444400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
Ответ: 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005 - 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005 = 44444444444000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005