exam Maths Puzzle Numerical Ability

Multiply. 8pq^2(2pq-3p+5q).

I have tried to multiply this and am not getting a resonable answer. Can you help please. Thanks.

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exam Other Question
Given that a set of data has a constant ratio of 8 and an initial value of 6, what is the rate of increase k What percent of 40 is 28?