book Maths Puzzle Numerical Ability

Simplify the following. (3x^2+sx+4)(-5x^3-x+3) (3n^5w)^2/(n^3w)^6 (6y-5)^2

9c^7w^-4(-d^2)/15c^3w^6(-d)^2 5m^-3/6^-1m^-2 (7x-5y)(2x+9y)

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book Other Question

The revenue R for a jazz concert is given by the equation R=-1/500(x squared-5500x) where x is the number of tickets sold. Determine the number of tickets that will yield maximum triplin the greater of two consecutive even integers gives the same result as subtracting 10 fom the lesser even integer. what are th integers?