Mathematics

Linear Algebra II Mathematics by Kenneth Kuttler 
Linear Algebra III Mathematics by Kenneth Kuttler 
An Introduction to the Theory of Complex Variables Mathematics by R.S. Johnson 
An Introduction to Group Theory Mathematics by Flor AceffSánchez, Octavio A. AgustínAquino, Emi

Essential Group Theory Mathematics by Michael Batty 
Elementary Algebra Exercise Book I Mathematics by Wenlong Wang, Hao Wang 
Engineering Mathematics: YouTube Workbook Mathematics by Christopher C. Tisdell 
Methods for Finding Zeros in Polynomials Mathematics by Leif Mejlbro