Simplify fully $$\(\left(\frac{256 x^{20}}{y^{8}}\right)^{-\frac{1}{4}}\)$$ (2) (b) Express $$\(\frac{1}{9 x^{2}-25}-\frac{1}{6 x+10}\)$$ as a single fraction in its simplest form. (3)

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