﹙1﹚﹙√3＋√8＋4﹚－﹙√27＋√32/2﹚
＝√3＋2√2＋4－3√3－2√2
＝4－2√3.
﹙2﹚ √5－√﹙1/5﹚＋√20/2
＝√5－√5/5＋5
＝9√5/5.