Learn how to use Mathcad, Mathematica and Maple  so you can   :

Edit math expressions - Define matrix and find its inverse and its determinant - Define functions and draw its graph - Solve equations - Derivatives - Integrals - 3D graph .

Learn how to use Geogebra so you can  :

Draw point, - Draw Line - Reflect regular polygon  and Rotate it - Define Functions and draw it - Move two points on function graph and its derivative graph - use algebra view, graph view , CAS view , spreadsheet view and 3D graph view