kill(all)$

van=facebook.com/LearningCalculus$

((7+4*sqrt(3))^(1/4))*sqrt(2-sqrt(3));

(2-sqrt(3))^(1/4) *(2-sqrt(3))^(1/4);

( (7+4*sqrt(3))*(2-sqrt(3))*(2-sqrt(3)) )^(1/4);

(7+4*sqrt(3))*(2-sqrt(3))*(2-sqrt(3));

expand(%);

%^(1/4);