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Simplify the following (i) sqrt45-3sqrt...

Simplify the following (i) `sqrt45-3sqrt20+4sqrt5` (ii) `sqrt(24)/8 + sqrt54/9` (iii) `root4(12) xx root7(6)` (iv) `4sqrt28 div 3sqrt7 div root3(7)` (v)` 3sqrt3+2sqrt27 + 7/(sqrt3)` (vi) `(sqrt3-sqrt2)^(2)` (vii) `root4(81)-8root3(216)+15root5(32)+ sqrt225` (viii) `3/sqrt8+ 1 / sqrt2` (ix) `(2sqrt3)/3- (sqrt3)/6`

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