Are you allowed to assume that ?

If so, take the transpose of and postmultiply by

For the LaTex input, use the Go Advanced option and 'press' the button and between the two [Tex] brackets type the line in as

(A^{T})^{(-1)}=(A^{(-1)})^{T}.

The ^ symbol translates as 'to the power of', and the power is then closed within the curley brackets.