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i have problem simplifying this math problem so i needed someone to help me understanding the order operation this problem could be sovle in thank you

I have this math problem that I can simplify ,I should needed to simplify the curvy parentheses and then square brackets with an exponent  and native 4+{-1(-2-1)}2

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when working with parentheses, always work inside out.  in this case you would evaluate -2-1 then multiply it by -1 then square it then add 4