ezplot('x-0.8*x^2+1.5*y',[-4,4,-1,4])
hold on
grid on
g=ezplot('x-1+y-sin(x-y)',[-4,4,-1,4])
set(g,'Color','r')
legend('x-0.8*x^2+1.5*y','x-1+y-sin(x-y)')
title('3. joonis')