=（9√2+√2-2√2）÷4√2=2
(3√18+1/5√50-4√1/2)÷√32=(9√2+√2-2√2)÷4√2=8√2÷4√2=2.
(3√18+(1/5)√50-4√(1/2) )÷√32=(9√2+√2-2√2 )÷(4√2)=(8√2)÷(4√2)=2
