[tex](9+ \sqrt{2}) ^{2} = \\ (1-4 \sqrt{3}) ^{2} = \\ ( 2 \sqrt{10}-3 \sqrt{2} ) ^{2} = \\ (4 \sqrt{5}-2 \sqrt{3} ) ^{2} = [/tex]

(9+√2)^2=81+18√2+2=83+18√2(1-4√3)^2=1-8√3+48=49-8√3(2√10-3√2)^2=40-12√20+18=58-12√20(4√5-2√3)^2=80-16√15+12=92-16√15