He invented a series of symbols that have a far-reaching influence on mankind? , function symbol f(x) and triangle symbols sin, cos, tg, etc. He invented it all. From Euler line of elementary geometry, euler theorem of polyhedron, Euler transformation formula of solid analytic geometry, Euler solution of quartic equation to Euler function in number theory, Euler equation of differential equation, Euler constant of series theory, Euler equation of variational method and Euler formula of complex variable function, they are all gifts for science students.

In addition, he also created several brand-new disciplines by the way:

Topology, ballistics, analytical mechanics, self-study as a cartographer.

Euler, relying on his own efforts, has successfully contributed countless knowledge points to China's mathematics textbooks. Let China students struggle in the mathematics ocean of senior high school entrance examination and college entrance examination.