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evaluate an arithmetic expression stored in a string (C#)
string myExpr="4*(80+(5/2))+2";

var engine = VsaEngine.CreateEngine();
Eval.JScriptEvaluate(mySum, engine);

string myExpr = "4*(80+(5/2))+2";
decimal result = Convert.ToDecimal(new Expression(myExpr).Evaluate());

Expression e = new Expression("Round(Pow(Pi, 2) + Pow([Pi2], 2) + X, 2)");

  e.Parameters["Pi2"] = new Expression("Pi * Pi");
  e.Parameters["X"] = 10;

  e.EvaluateParameter += delegate(string name, ParameterArgs args)
    {
      if (name == "Pi")
      args.Result = 3.14;
    };

  Debug.Assert(117.07 == e.Evaluate());

int mySum = 4*(80+(5/2))+2;

var myStringSum = mySum.toString();