A program for calculating linear equations and inequations, as well as quadratic equations and for resolving a matrix (3 equations with every 3 unknown quantities). The program offers the possibility individual calculation steps display to let and is suitable so ideally for completing homework. For example in logical way the largest one common divisor will become determined and the individual calculation steps so ideally shortened. It is also possible the results to print out as well as the individual calculation steps. Additionally the program has a very extensive on-line assistance. (Software is in German.)