Simplify the radical expressions:
(1).sqrt75+sqrt3
(2).sqrt7(sqrt14+sqrt3)
(1) sqrt3*(5+1) = 6 sqrt3
(2) sqrt7*(sqrt7*sart2 + sqrt3)
= 7 sqrt2 + sqrt21
(1).sqrt75+sqrt3
(2).sqrt7(sqrt14+sqrt3)
(2) sqrt7*(sqrt7*sart2 + sqrt3)
= 7 sqrt2 + sqrt21