Matrices start with an opening brace ([) and end with a closing brace (]). Each row must also start with an opening brace and end with a closing brace. Each element must be a real number or a complex number separated by spaces.
Examples: [[1 2] [3 4]], [[(1,2) (3,4)] [5 6]]
Each element of a vector is displayed as a real number or a complex number.