√1/2-√147-(9×1/√27-4√1/8)
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√1/2-√147-(9×1/√27-4√1/8)
√1/2-√147-(9×1/√27-4√1/8)
√1/2-√147-(9×1/√27-4√1/8)
=√2 /2 -7√3-(9×√3/9-4√2/4)
=√2/2-7√3-√3+√2
=3√2 /2 -8√3