exam Maths Puzzle Numerical Ability

Can I add exponents and subtract them from each other then solve?

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exam Other Question

Multiply. 7w(2w - 3)(2w + 3)

Please help with this I have tried to work this problem and I am confused now because I cannot figure this out. Thanks. Divide this, please. Thanks.

(p^2 - q^2)/(p+q) divided by (p+q)/(p-q)