3root(6)+5root(2)
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6 radical 2
2√20 - 3√7 - 2√5 + 4√63 = 2√(4 x 5) - 3√7 - 2√5 + 4√(9 x 7) = 4√5 - 2√5 - 3√7 + 12√7 = 2√5 + 9√7
36
2 + 5 + 3 + 3 = 13
4√5 + 4√5 = 8√5.