exam Maths Puzzle Numerical Ability

Using order of operations how do i solve

1/2(6-2)squared-4x3

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exam Other Question

Subtract;
5y^2 + 2y - 9 from 10y^2 + 3y + 5

Do I use the foil method or do I try to combine like terms on this one? Thanks
Assume that x is a positive number.
Use the logarithm properties to present the expression:

log(x + 5) - log x

as the logarithm of a single quantity.