Procedure Main()
   local bAdd := {|Label,n1,n2| Qout( Label ), QQout( n1 + n2 )}
   Eval( bAdd, "5+5 = ", 5, 5 )
   Eval( bAdd, "5-5 = ", 5, -5 )
   return

Upon execution you see:
5+5 = 10
5-5 =  0