exam Maths Puzzle Numerical Ability

help to simplify

-2^2 - (-2)^2 - absolute vale of 2^2 - 3^2 end absolute value - 1/-2^3 - 3^0(-2^3 - 3^2)

thank u

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exam Other Question

2. Suppose y=100-5x and z=x(y-1)
Δy/Δx=?
∂z/∂x=?
∂z/∂y=?
Δz/Δx=? Im thinking of a number
when i subtract 25 from the number the square it the answer
i get is the same as
when i square the number the subtract 25 from the answer

what is my number?