√18 + (√98 - √27)
= 3√2 + 7√2 - 3√3
= 10√2 -3√3
(√24 + √0.5) - (√0.125 -√6)
= 2√6 + √(2/4) - (√(2/16) -√6)
= 2√6 + (1/2)√2 - (1/4)√2 + √6
= 3√6 +(1/4)√2