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1.(√14+3)²+(√7-3√2)²-(√15-√7)(√15+√7)

2.(√6-2)²+2(1+√6)²+(√6-2)(√6+2)
3. 2·(3√3+1)²+3(√3-2)²-(11-√15)(11+√15) va rog dao coroana