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Find the value of'

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(i) Let `y-(x^(2)-3x^(2)+4)(4x^(5)_x^(2)-1)`
`(dy)/(dx)=(x^(3)03x^(2)+4)(d)/(dx)(4x^(5))+(d)/(dx)(x^(2))-(d)/(dx)(1)+(4x^(5)+x^(2)-1)[(d)/(dx)(x^(3))-(d)/(dx)(3x^(2))+(d)/(dx)(4)]`
`(x^(3)-3x^(2)+4)[4(d)/(dx)(x^(5))+(d)/(dx)(x^(2))-(d)/(dx)(1)]+(4x^(5)+x^(2)-1)[(d)/(dx)(x^(3))-3(d)/(dx)(x^(2))+(d)/(dx)(4)]`
`=(x^(3)-3x^(2)+4)(20x^(4)+2x)+(4x^(5)_x^(2)-1)(3x^(2)-6x)` ltbr. `=2x(10x^(3)+1)(x^(2)-3x^(2)+4)+3x(x-2)(4x^(3)+x^(2)-1)`
(ii) Let `y=(9x^(5))/(x-3)`
`(dy)/(dx)=((x-3)(d)/(dx)(9x^(5))-9x^(5)(d)/(dx)(x-3))/((x-3)^(2))`
`=((x-3)xx9(d)/(dx)(x^(5))-9x^(5)[(d)/(dx)(x)-(d)/(dx)(3)])/((x-3)^(2))=((x-3)xx9xx5x^(4)-9x^(5)(1-0))/((x-3)^(2))`
`=(45x^(5)0135x^(4)-9X^(5))/((x-3)^(2))=(36x^(5)-135x^(4))/((x-3)^(2))=(9x^(4)(4x015))/((x-3)^(2))`
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