This book teaches how to create mathematical models that represent real-life problems associated with terminal illnesses such as cancer; it also discusses hyperlipidemia and the use of treatment in controlling cancer cell proliferation and hyperlipidemia-related circulation disorders.The book demonstrated how to formulate problems and solve them both without and with treatment.It also taught how to perform meticulous numerical simulations with Wolfram Mathematics, where some sensitive parameter values were checked to determine their level of sensitivity.The book is also a valuable resource for mathematicians, mathematical modelers, oncologists, biophysicists, university postgraduate students, and independent researchers.