A=[1 -4 13 0
    27 5 2 -4
    3.5 16 2 1
    7 8 1 -2];
b=[1 2 4 -17 32];
determinant=det(A)
transponeeritud=A'
poord=inv(A)
veeruvektor=b'
C=A^2-A.*A+3*inv(A)
vastus=A*C
vastus1=A\C
vastus2=A./C
vastus3=((A(1,3)+A(2,3))/(A(2,2)-A(4,4)))^2*b(4)-C(3,1)/b(5)*C(4,4)^2