% Tund 1, ülesanne 2
% a) 
x=2; % ; ei kuva seda rida käsuaknas
y=-1;
z=5;
u=(x*y+z/(x-4*y^2)+z^2)/(x^3+y^2-3*z*x)
v=(x*y*z+x^2-(2*y)^2)^(5/(x+y))
% b) 
x=-6;
y=5;
z=-2;
u=(x*y+z/(x-4*y^2)+z^2)/(x^3+y^2-3*z*x)
v=(x*y*z+x^2-(2*y)^2)^(5/(x+y))