How to fix Expectid list separator or ) VBA error?

Question

Visual Basic

I recently started using VBA, please tell me what could be wrong:
I have an active sheet, the name of which dynamically comes to the module (lstname), this sheet has several cells in which values ​​\u200b\u200bare written (matrix), I want to calculate its determinant, I decided use the mdterm function, but the error "Expectid list separator or )" crashes, I did not find the documentation, or most likely did not understand it.

Option Explicit
Public Sub MatrixFunc(lstname As String)
Dim Det As Variant, Matrix As Variant
'Det = ThisWorkbook.Worksheets(lstname).MDETERM(B2:E5)
'...
End Sub
Вместо ... результат хочу вставить в какую-нибудь ячейку, подскажите что не так делаю