Change FindValueOfExpression signature to return symbolic.Expression#27

kwesiRutledge merged 3 commits intocopilot/create-get-optimal-objective-value-functionMatProGo-dev/MatProInterface.go:copilot/create-get-optimal-objective-value-functionfrom

copilot/update-findvalueofexpression-signatureMatProGo-dev/MatProInterface.go:copilot/update-findvalueofexpression-signatureCopy head branch name to clipboard