Academic License

A=]1,2;-2,2]
 A=]1,2;-2,2]
   |
{Error: Unbalanced or unexpected
parenthesis or bracket.
} 
A=[1,2;-2,2]

A =

     1     2
    -2     2

B=[-3,1;-1,-1]

B =

    -3     1
    -1    -1

A+2*B

ans =

    -5     4
    -4     0

inv(A)

ans =

    0.3333   -0.3333
    0.3333    0.1667

inv(A)*A

ans =

    1.0000   -0.0000
         0    1.0000