Evaluate :

`( sqrt(7) - 6 ) times ( sqrt(3) - sqrt(7) )`

Evaluate : ( sqrt(3) + sqrt(7) ) times ( sqrt(3) + sqrt(7) )

Evaluate : ( sqrt(7) + sqrt(2) ) times ( sqrt(3) + sqrt(8) )

Evaluate : ( sqrt(3) - sqrt(6)) times ( sqrt(3) + sqrt(6))

Evaluate : ( sqrt(5) + sqrt(7 ) ) /( sqrt(5) - sqrt(7 ) )

Evaluate : ( sqrt(7) + sqrt(5) ) ( sqrt(5) - sqrt(7) )

Evaluate : sqrt(3) times ( sqrt(7) - sqrt(3) )

Evaluate: sqrt(3+4sqrt(-7))

The value of (1)/( sqrt(7) - sqrt(6)) - (1)/( sqrt(6) - sqrt(5) ) +(1)/( sqrt(5) -2) - (1)/( sqrt(8) - sqrt(7) ) +(1)/( 3- sqrt(8)) is

Solve : ( 5 + sqrt(7)) times ( 5 - sqrt(7))

1/(sqrt7 - sqrt6)