(i) Find, in ascending powers of \(x\), the first 3 terms in the expansion of \(\left(2-\dfrac{x^2}{4}\right)^6\).

(ii) Hence find the coefficient of \(x^2\) in the expansion of \(\left(2-\dfrac{x^2}{4}\right)^6\left(\dfrac1x+x\right)^2\).