Peace is far away. Learning needs peace first, especially mathematics, which requires patience. At the same time, people who are good at math are smarter, and wise men sail!

Dust note

Mathematics is profound and profound, and the wisdom contained in mathematics is vast. Mathematics is also the foundation of everything, and all mathematicians will be able to understand dust.

"deep well"

Mathematics is an unfathomable subject, as deep and mysterious as a deep well, which will lead us to another world!