Question: please help me Show by logical derivation (apply logical equivalency laws step by step to show) that -(- - -)-(4-9) is a tautology. Write the

please help me

please help me Show by logical derivation (apply logical equivalency laws step

Show by logical derivation (apply logical equivalency laws step by step to show) that -(- - -)-(4-9) is a tautology. Write the name of the law that you use at each step. You can write "and", "or", "not" instead of using symbols A, V, respectively

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