This software calculates the differentiation of an algebraic expression. If you have an expression with the variable x and you want to have the differentiation dy/dx, the software will calculate it. E.g. sin(a*cos(x)) gives the result -COS(A*COS(X))*A*SIN(X). The software can differentiate very complicated expressions. The only limitation is the size of the output string. This software is shareware. The evaluation version has some limitations about the available mathematical functions and the output string is limited to 100 characters.