Evaluate
`( sqrt(2) + 1)/ ( sqrt(2) - 1) + ( sqrt(2) - 1) / ( sqrt(2) + 1)`

Evaluate : ( sqrt(2) - 1/sqrt(2) ) times ( sqrt(2) - 1/sqrt(2) )

Evaluate : 1/( 1 + sqrt (2) ) + 1/( sqrt(2) + sqrt (3) ) + 1/ ( sqrt(3) + sqrt (4) )

Evaluate : 1/( sqrt(3) + sqrt(2)) + 1/( sqrt(3 ) - sqrt(2))

Evaluate : 1/( sqrt(3) + sqrt(2)) + 1/( sqrt(3 ) - sqrt(2))

Evaluate : 1/( sqrt(3) + sqrt(2)) + 1/( sqrt(3 ) - sqrt(2))

Evaluate (1/sqrt(2))/(1/sqrt(2)+sqrt(3))

Evaluate : Find the value of sqrt( 3 + sqrt(5)) a ) sqrt(3)/2 + 1/sqrt(2) b ) sqrt(3)/2 - 1/2 c ) sqrt(5)/2 - 1/sqrt(2) d ) sqrt(5)/sqrt(2) + 1/sqrt(2)

If a=(sqrt(2)+1)/(sqrt(2)-1) and b=(sqrt(2)-1)/(sqrt(2)+1) ,then find the value of a^(2)+b^(2)-4ab