हल करना (7 ^ - 1 - 8 ^ - 1) ^ - 1 - (3 ^ - 1 - 4 ^ - 1) - 1 | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$(7^{-1}-8^{-1})^{-1}-(3^{-1}-4^{-1})-1$$