A vertical symbol "one" is removed from the symbol "ten", which means reduction. The earliest user of this symbol was15th century German mathematician Wei Deshou. "You" was initiated by Awdelay, an American mathematician in the18th century. The symbol "ten" is inclined, indicating the continuous addition of several identical addends. The "+"symbol was put forward by the Swiss mathematician Hannah in the18th century. It is a combination of the dividing line of the ancient Arabic symbol "-"and the comparative symbol ":",which means decomposition, and a straight line separates the two circles. Second, the origin of "=" and "O" "=" was first used by the British mathematician Lekot in16th century. He has a famous saying, "Nothing in the world is more the same as these two parallel and equal straight lines". In his masterpiece "The Grindstone of Wisdom", the symbol "=" was used to express equality for the first time. In ancient China, during the Southern Song Dynasty more than 700 years ago, an outstanding mathematician named Qin was born in Anle County, Sichuan Province. According to historical records, he was the first person in China who stipulated that a single mathematical symbol "O" was used to represent zero. The origin of "()" and "[]" The brackets () "were first used by the Dutch Gilat in the17th century. The brackets ""first appeared in17th century English works by Vastus.