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c 3√5-7-{√2+[15√5-3(√5-4√2)]: 12); d 4√6 +2√2-16√2-2(3√2-2√3)]; 16+3√7-121√3-3-(7√3+2√7)]; 13√2+2-(15√3-3-(12√2-5(√2-√3)]}; g 180√5+4√5 (18√2-3√5-18√10-3(2√10-√5)]}.​

Răspuns :