A Computer Algebra System (CAS) is a software program designed to perform symbolic mathematics. Unlike standard calculators that handle numerical calculations, a CAS can manipulate algebraic expressions, solve equations, and perform calculus operations symbolically. This allows users to see the exact form of solutions rather than just numerical approximations. CAS tools are widely used in education, engineering, and research for tasks such as simplifying expressions, factoring polynomials, and solving differential equations. Popular examples of Computer Algebra Systems include Mathematica, Maple, and SageMath, which provide powerful features for both beginners and advanced users in various mathematical fields.