Evaluate
72-99\sqrt{3}\approx -99.473029949
Factor
9 {(8 - 11 \sqrt{3})} = -99.473029949
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396-99\sqrt{3}-324
Combine -288\sqrt{3} and 189\sqrt{3} to get -99\sqrt{3}.
72-99\sqrt{3}
Subtract 324 from 396 to get 72.
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