Methodological aspects of Mathematics using Computer Algebra Systems

We investigate a possible application of computer algebra system as a tool in learning and teaching mathematics. There are analyzed the technical and didactic aspects of some mathematical expressions using different systems. The main purpose is to help pupils, students, teachers in better understanding of different computer algebra systems. Knowing the advantages and disadvantages of these systems, they became able for correct application of these systems. The examples are basically taken from secondary school, but also they can be part of other exercises in faculties. There are used the basic commands of the computer algebra with which the teachers and students are familiar.. Key-Words: Computer algebra systems, simplification, solution, equation, expression, teaching, learning, comparison.