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RatCalcScreenshot 

 

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

Screenshot of RatCalc