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Simplify: (i) (4)/((2187)^(-3//7) ) - ( ...

Simplify: (i) `(4)/((2187)^(-3//7) ) - ( 5)/( (256)^(-1//4) ) + (2)/( ( 1331^(2) )^(-1//3) )`
(ii) `((x^(a) )/( x^(b) ) )^((1)/(ab) ) ((x^(b) )/( x^(c) ) )^((1)/(bc) ) ( (x^(c) )/( x^(a) ) )^( (1)/(ca) )`

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The correct Answer is:
C
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