二次根式的计算:(1)√75+√1又1/8-(√18-√4/3);(2)(√6+√10-(4))(√3+√5+√8);
(3)(√54-2/5√50)-(√9/2-√3/8);(4)(√27-3√1/8)-2(√1/3+√9/32);
(5)√3/14÷4√2/3;(6)-√5xy÷√x/5y(x>0);
(7)2/b√ab^3·(-3/2√a^3b)÷3√b/a(a>0,b>0):(8)-9√1/45÷2/3√2/5;
(9)√27-(√5又1/3+√75);(10)1/2(m)(√4m+6m√m/9-2m^2√1/m);
(11)√8+√18+√1/8;(12)(4√6-4√1/2+3√8)÷2√2;
(13)(√3+√2)^2-(√3-√2)^2;(14)(3/4√24+2/3√6)·√18;
(15)(√3-2/√3)^2;(16)5√1/5+1/2√20-5/4√4/5+√45;
(17)3/2√20·(-√15)·(-1/3√48);(18)2/3√9x+6√x/4-2x√1/x.