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on 3 Oct 2022
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hold on
axis off
x=1:.1:5;
u=atan((x-4)*3);
v=-.1*(x-2.5).^2+1.9;
p=plot(x,u,'k',x,v,'k');
p(2).LineWidth=3;
rectangle('Position',[1.5 -1.3 2 3.2],'Curvature',[1,1],'FaceColor',[.7 .7 .7])
rectangle('Position',[2.1 -.4 .8 1.3],'Curvature',[1,1],'FaceColor','k')
plot(2,.5,'.w','MarkerSize',150)

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