public void VerifyFormulas()
        {
            var notifies = new Totals
            {
                TaxPercentage = 20
            };
            var mortgateCalculatorViewModel = new MortgateCalculatorViewModel();

            VerifyExpression(() => (int)(notifies.SubTotal * (1m + (notifies.TaxPercentage / 100m))), "(notifies.SubTotal * (1 + (notifies.TaxPercentage / 100)))");
            VerifyExpression(() => InstanceMethodCall(), "InstanceMethodCall()");
            VerifyExpression(() => notifies.InstanceMethod(), "notifies.InstanceMethod()");
            VerifyExpression(() => mortgateCalculatorViewModel.RegeneratePaymentSchedule(true), "mortgateCalculatorViewModel.RegeneratePaymentSchedule(true)");
            VerifyExpression(() => StaticMethod(notifies.SubTotal), "StaticMethod(notifies.SubTotal)");
            VerifyExpression(() => StaticMethodLotsOfArguments(notifies.TaxPercentage, notifies.TaxPercentage, notifies.TaxPercentage, notifies.TaxPercentage), "StaticMethodLotsOfArguments(...)");
        }