RatCalc

  Use RatCalc to evaluate complex expressions, plot F(x) graphs or solve a set of linear equations.
You Can draw F(x) graphs with variable parameters.
You can calculate roots, integrals...etc
You can solve a set of linear equations such as :

23a+15b+17c=1
8a+11b=6c
4a+17b+12c-2b+4=5

Press «Solver button» to solve equations.