simplify : (a) ` sqrt(98) + sqrt(8) -2 sqrt(32)` (b) ` (sqrt3 + sqrt5 + sqrt6) (sqrt3 - sqrt5 + sqrt6)`

Prove that sqrt(98) + sqrt8 - 2 sqrt(32) = sqrt2

6/(sqrt5 - sqrt3)

6/(sqrt5 + sqrt3)

6/(sqrt5 + sqrt3)

Simplify : 5sqrt ( 8) - 2 sqrt( 32) - 2sqrt2

Simplify (sqrt5 - sqrt3)(sqrt5 + sqrt 3)

Simplify (1)/(3 - sqrt(8)) - (1)/(sqrt(8) - sqrt(7)) + (1)/(sqrt(7) - sqrt(6)) - (1)/(sqrt(6) - sqrt(5)) + (1)/(sqrt(5) - 2)

Simplify: (3 sqrt2)/(sqrt3 + sqrt6) - (4 sqrt3)/(sqrt6 + sqrt2) + (sqrt6)/(sqrt2 + sqrt3)

Simplify : (\sqrt 5 - \sqrt 3)/(\sqrt 3 + \sqrt 5) \times (\sqrt 5 - \sqrt 3)/(\sqrt 3 -\sqrt 5)