book Maths Puzzle Numerical Ability

find the exact value of tan 30 degrees

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I have a question..I Have my S.A.T.'s and I am not very good at MATH in genereal since there will be Algerbra and Gemoetry..and I am confused where CAN I LOOK for help? Is there a Simplify
5u^6w^3*7z^-8w^-3*2z^3u^-5