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2014-11-03T16:30:09+02:00
5√15-2√2+√60+7√8-6√3-√5+√32
√60=2√15
7√8=14√2
√32=4√2
5√15-2√2+2√15+14√2-6√3-√5+4√2=7√15+16√2-6√3