根号18减去根号2分之根号9减去根号3分之根号3加根号6再加上〔根号3减2〕的零次方加上根号下〔1减根号2〕平
=√18-√9/√2-(√3+√6)/√3+(√3-2)^0+√(1-√2)^2
=3√2-3√2/2-1-√2+1+1+√2-1
=3√2/2