After long days of being on the farm, all the animals and even the farmer himself suit up for a fun game of baseball. Everyone loves it, but Donkey always struggles with catching, throwing and hitting. Donkey is no natural athlete, but a willingness to work hard, practice and accept coaching from his mentor, the Toad, puts Donkey in a position to succeed. Under Toad's tutelage, Donkey learns that no matter your skill, if you practice and work hard you can always improve, have more fun and ...

Number theory could be divided into additive number theory and multiplicative number theory. In this book we raise the so-called additive and multiplicative equation, it is our new creation, and it is the collection and extension of research results by the author in the past decade. They are related with classical number theory problems. The contents consists of 7 chapters, i.e., New Waring Problem, New Fermat Problem, Euler's Conjecture, Representations of Integers as Sums of Squares, Fig...