# # # # Int(Int(2*x*y,x=0..1),y=0..1) < Int(Int((x+y+1)^2,x=0..1),y=0..1); # # Int(Int(1,y=-sqrt(a^2-x^2)..sqrt(a^2-x^2)),x=-a..a) = int(int(1,y=-sqrt(a^2-x^2)..sqrt(a^2-x^2)),x=-a..a); # # # #