what is [(7 raised to -1 - 8 raised to -1) whole raised to -1] -[(3 raised to -1 - 4 raised to -1) whole raised to -1] pls say fast

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Step-by-step explanation:

7 raised to -1 - 8 raised to -1 whole raised to -1 is 56

3 raised to -1 - 4 raised to -1 whole raised to -1 is 12