0
t 2+((3*6+1)/11)*22
add referans to your project (Project->Add Referance->.Net...)
1- Microsoft.JScript
2- Microsoft.Vsa
under click event write this code
object _objResult;
Microsoft.JScript.Vsa.VsaEngine _Engine =
Microsoft.JScript.Vsa.VsaEngine.CreateEngine();
_objResult = Microsoft.JScript.Eval.JScriptEvaluate(textBox1.Text, _Engine);
MessageBox.Show(_objResult.ToString());