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by taking the denominator
LCM
7√3/√10+√3*√10-√3/√10-√3
7√30-7√9/7.......1
2√5/√6-√3*√6+√3/√6+√3
2√30+2√15/3....2
3√2/√15+3√2*15-3√2/15-3√2
3√30-18/3....3
now,
-21√9-14√30+14√15-126/21 answer
LCM
7√3/√10+√3*√10-√3/√10-√3
7√30-7√9/7.......1
2√5/√6-√3*√6+√3/√6+√3
2√30+2√15/3....2
3√2/√15+3√2*15-3√2/15-3√2
3√30-18/3....3
now,
-21√9-14√30+14√15-126/21 answer
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