exam Maths Puzzle Numerical Ability

How do you simplify. It is under Problem Set 4.1 number 47.

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exam Other Question

I am not sure if you would use the foil method to answer this question or not.
(2x-y)*2. (*2 means squared)
I am confused on this question. I would really appreciate your help. Thanks Please help

List the like terms in the following group of terms.
6x, -7wx2, 4w2x, 8wx2, -2wx2, -9w2