MATLAB: Where am I going wrong with the code

integrationvector

pv=@(x,y,z) (x.*(y.^2)*(exp(-2*z.)))

Q=integral3(pv,0,2,0,2,0,2)

when I add a . to the z is when I get an error

pv=@(x,y,z) (x.*(y.^2).*(exp(-2.*z)))

You can draw it using meshgrid and surf

[X, Y] = meshgrid(linspace(-3,3));
Z = exp(-X.^2-Y.^2);
surf(X,Y,Z)
shading interp

simplify(ans, 'steps', 100)