anchor.diff:          controller.ExecuteExpression "Pi = 3,4"|> ignore
   
       [<Fact>]
  -    let testIfsAdv() =
  +    let IfsAdv() =
           let controller = initController()
           prepareVariables controller
           let testWithCurrInstance = testInput controller
  
positive.code:         testWithCurrInstance "13,3824939607035" "exp(a) + asdfsdf - 2*Pi"
  
      [<Fact>]
      let testIfsSimple() =
          let testWithCurrInstance = testInput (initController())
          testWithCurrInstance "2" "if(1;2;3)" 
          testWithCurrInstance "3" "if(0;2;3)" 
  
negative.code: 
          
      [<Fact>]
      let SimpleExpression() =
          let controller = initController()
          let result = controller.ReturnResult("2 + 3")
          result |> should (equalWithin 0.1) 5
  
      [<Fact>]
      let ComplexExpressions() =
          let testWithCurrInstance = testInput (initController())
          testWithCurrInstance "-107,306989780239" "3*(7+7)/2-2*6/7- &&&  (&6 +&9) *8-  (2+ 2/3*(6+exp  (2*7-6* 2 ) - 8)+(2>1))"
          testWithCurrInstance "-107,306989780239" "3*(7+7)/2-2*6/7-(6+9)*8-(2+2/3*(6+exp(2*7-6*2)-8)+(2>1))"
  