Question: How to compute inverse of square matrix?

How to compute inverse of a square matrix in maple?

Like below matrix:

Matrix(6, 6, [[1/EE__1, -nu__21/EE__2, -nu__31/EE__3, 0, 0, 0.], [-nu__12/EE__1, `#mn("1")`/EE__2, -nu__32/EE__3, 0, 0, 0.], [-nu__13/EE__1, -nu__23/EE__2, `#mn("1")`/EE__3, 0, 0, 0], [0, 0, 0, 1/GG__23, 0., 0], [0, 0, 0, 0., 1/GG__13, 0], [0., 0., 0, 0, 0, 1/GG__12]])

Maple help say there is a mode n number, but what actually is it?

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