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1)  twice b added to a
    The sum of a and twice b
    twice b more than a

2)  the difference between thrice x and four times y
     the product of 4 and y less than thrice x
     the product of 3 and x less the product of 4 and y
     (note that "less than" is not the same as "less")

3.  the quotient of the product of twice x and y
     Twice x divided by y
     the product of 2 and x divided by y
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