TValueRec Recalculate
Re-evaluates expression in Context.
Returns: TValueRec - the result of expression stored in Dew.Math.TMtxFunctionEvaluator.Context as Dew.Math.TValueRec.
Remarks:
The procedure loads context from Dew.Math.TMtxFunctionEvaluator.Context property, uses internal parser to evaluate expressions (now stored in Dew.Math.TMtxFunctionEvaluator.Expressions property and returns result of expression evaluation.