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Simplify: {(1/3)^(-3)-\ (1/2)^(-3)}-:(...

Simplify: `{(1/3)^(-3)-\ (1/2)^(-3)}-:(1/4)^(-3)`

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GIven
`{(1/3)^-3-(1/2)^3}`-:`(1/4)^-3`
`(1/3)^-3`
`(3^3)`
`(1/2)^-3`
`(1/4)^-3`
`(4^3)`
`(3^3-2^3)-:(4^3)`
`(27-8)-:64`
`(19/64)`
Hence simplifying
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