A=[4 7 5 8
    -3 0 12 exp(1)
    1 -1 3 2
    0 7 pi 13]
x=[5
    10
    -10
    25
    100]
transponeeritudA=A'
determinant=det(A)
poordmaatriks=inv(A)
transponeeritudx=x'
vastus=A(1,1)+A(2,2)+A(3,3)-A(4,4)+x(2)
korrutis1=A*A'
korrutis2=A*inv(A)
