exam Maths Puzzle Numerical Ability

I am supposed to simpify:

12-2[3-(-2)^2/4]+1

Thank you

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exam Other Question

I do not understand how to find if the answer is true or false on page 468. How do you find a fourth of a fourth of x? Subtract the radical expressions as indicated.

17 3rd root of 81 - 2 3rd root of 24

How is this done?