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3√5-7-√2+(15√5-3(√5-4√2)]:12}; d 4√6 +2√2 [6√2-2(3√√2-2√3)]; e 16+3√7 [21√3-3-(7√√3+2√7)]; f 13√2+2 (15√3-3-[12√2-5(√2-√3)1}; g 180√5 +4√5 (18√2-3√5 [8√10-3(2√10-√5)]}. C