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2014-11-10T16:23:04+02:00
2√3*(√5²-1²)+(2√3)²-2*2√3*5+5²+(3√3)²+2*3√3*2+2²=2√3*5-1+12-20√3+25+27+13√3+4=10√3-1+12-20√3+25+27+13√3+4=3√3+55
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