The ancient Egyptians may have written the first math text called the Moscow Mathematical Papyrus
equal
Ancient Greeks
No one knows no one cares
the discovery of zero
Ancient Greeks
The "-" can be a mathematical "minus" sign or a "hyphen" if used as part of text.
Moon Runes are the hidden text on Thorin's ancient dwarven map.
Vedas
ancient Greeks
An abacus is an ancient mathematical tool invented by the Japanese.
I think it is addition