View Compilation Error

852469_0_0_14015.cpp: In function `int main()':
852469_0_0_14015.cpp:425: error: no match for 'operator*' in '(&(&mat_g)->Matrix_Square::operator^((n + 2)))->Matrix_Square::operator-(((Matrix_Square&)(&mat_g))) * (&(&mat_g)->Matrix_Square::operator-(((Matrix_Square&)(&mat_one))))->Matrix_Square::inverse()'
852469_0_0_14015.cpp:314: note: candidates are: Matrix_Square Matrix_Square::operator*(Matrix_Square&)
852469_0_0_14015.cpp:325: note:                 Matrix_Square Matrix_Square::operator*(double)