Microsoft Live Search enhanced its calculator a step ahead of Google Search by introducing Algebra expressions evaluation capability. Now you can input a valid mathematical expression with variables, Live search will evaluate the values of the variables for you. You can try the live search with the simple algebra expression x^2-3x+2=0.
May be you can use this service when kids asks your help for solving algebra expressions. But don’t give this information to your kids as they should learn how to do it for themselves.