﹙√2+√3﹚/2-3/4 ﹙√2+√27﹚
=√2/2+√3/2-3√2/4-9√3/4
=﹣√2/4-7√3/4.
a²√﹙8a﹚+3a√﹙50a³﹚
=2a²√2a+15a²√2a
=17a²√2a.