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Simplify : (i)(5/8)^(-7)xx (8/5)^(-5) ...

Simplify : (i)`(5/8)^(-7)xx (8/5)^(-5)` (ii) `((-2)/3)^(-2)xx(4/5)^(-3)` (iii)`(3/4)^(-4)-:(3/2)^(-3)` (iv) `(3/7)^(-2)xx(7/6)^(-3)`

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(i)`(5/8)^(-7)xx (8/5)^(-5)`
`(8/5)^7xx(5/8)^5`
`(8^7/8^5)xx(5^5/5^7)`
`8^(7-5)xx5^(5-7)`
`8^2xx5^-2`
`64/25`
(ii) `((-2)/3)^(-2)xx(4/5)^(-3)`
`(3/-2)^2xx(5/4)^3`
`(9/4)xx(125/64)`
`1125/256`
(iii)`(3/4)^(-4)-:(3/2)^(-3)`
`(4/3)^4-:(2/3)^3`
`256/81xx27/8`
`32/3`
(iv) `(3/7)^(-2)xx(7/6)^(-3)`
`(7/3)^2xx(6/7)^3`
`(7^2)/(7^3)xx(6^3)/(3^2)`
`(1/7)xx(216/9)`
`1/7xx24`
`24/7`
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