summary of 3 chapters

I need to summarize 3 chapters 

7.Antiinfective and attinflamatory Drugs

8. Chemotherapeutic Drugs and Biologic and immune Modifiers

9. Drugs Affecting the Gastrointestinal System and nutrition

Instructions: 

summarize but do not go to the extreme (presenting only half of the page or either copying everything from the book) Consider the most important thing about the chapters.

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