This book aims to help students in the science and technology field understand both the taught and examinable material. It contains concise theory, solved exercises (to reinforce the theory), as well as practice exercises. It also includes exams of all types required by the examination system, both by unit and for revision. All the exercises and exams are solved at the end of the book. It covers school chapters from "Complex Numbers" to "Limit - Continuity of a Function". The second volume covers school chapters from "Derivative" to "Area of a Plane Region".