ezplot with normalized axes

I have generated a plot figure(1) from a two-variable function f using the ezplot command and both the axes are in the range between -30 and 30. Now I want to have another plot (figure(2)) but with normalized axes in the range between -1 and 1 by dividing both axes with a constant 22. How should I do it by still using the ezplot command? In matlab help. I see there is an ezplot commmand using axes_handles but don't see examples and details in it. My function f is a complicated implicit equation of two variables x and y so an implicit solution of y=f(x) is not possible. My script looks like below. How should I proceed after the line figure(2). Thanks in advance.

syms x y

f= a function containing x and y; ezplot(f, [-30 30 -30 30]);

figure(2)