exam Maths Puzzle Numerical Ability

Given f(x)=2x+2, find f(-1)

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exam Other Question

what is

p to the second minus 10pq plus 16q to the second?
so far i got....(p+16q)(p+q)
How do i do this?

Simplify (all positive exponents)
[(3^-3u^2w^-5)/(6^-1u^-1w^-2)]^-2