Question 169506
*STAR* equals square root sign. 
Problem: 
3*5/7 - 5*7/5 + 3*140
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3sqrt(5/7) - 5sqrt(7/5) + 3sqrt(140)

= (3/7)sqrt(35) - sqrt(35) + 3*2sqrt(35)

= 5 3/7 sqrt(35)

= (38/7)sqrt(35

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Chers,
Stan H.