book Maths Puzzle Numerical Ability

Hi! i'm stuck on this problem. Radical and fractional exponents
(3{{{SQRT}}2- 2{{{sqrt}}}3) ^3.

thanks

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book Other Question

You are on a pleasure cruise through the universe and you crash in the ocean of an unknown planet. Your spaceship floats on the water and its top is 39 feet above the surface of th perimeter of a rectangle is 22 inches and its length is 4 inches less than twice its width. Set up a system of linear equations and solve to find the dimensions of the rectangle.