The series of elementary algebra exercise books is designed for undergraduate students with any background and senior high school students who like challenging problems. This series should be useful for non-math college students to prepare for the GRE general test - quantitative reasoning and GRE subject test - mathematics. All the books in this series are independent and helpful for learning elementary algebra knowledge. The number of stars represents the difficulty of the problem: the least difficult problem has zero stars and the most difficult problem has five stars. With this difficulty indicator, each reader can easily pick suitable problems according to his/her own level and goal. Elementary Algebra Exercise Book III includes exercise problems for Complex Numbers, Permutations, Combinations, Binomial Theorem, and Calculus.

### About authors

Mr. Wenlong Wang

Mr. Wenlong Wang is a retired mathematics educator in China. He has been working on algebra and geometry problems for many years, and has taught many students in the past few years. He is an expert and a senior researcher in mathematics education.

Professor Hao Wang

Professor Hao Wang is a faculty member in the Department of Mathematical & Statistical Sciences at the University of Alberta, an advisory board member of Centre for Mathematical Biology, an associate editor for International Journal of Numerical Analysis & Modeling – Series B, an editor for Nonlinear Dynamics and Systems Theory (an international journal of research and surveys), an editor for a special issue of The Canadian Applied Mathematics Quarterly, and an associate faculty member for Faculty of 1000 Biology. Dr. Wang has strong interests in interdisciplinary research of mathematical biology. His research group is working on areas as diverse as modeling stoichiometry-based ecological interactions, microbiology, infectious diseases, predator-prey interactions, habitat destruction and biodiversity, risk assessment of oil sands pollution. Mathematical models include ordinary differential equations, delay differential equations, partial differential equations, stochastic differential equations, integral differential/difference equations.