Differentiate w.r.t x using quotient rule .
`(x^(4)+1)//(x^(2)-1)`

Explanation

To differentiate the function \( y = \frac{x^4 + 1}{x^2 - 1} \) with respect to \( x \) using the quotient rule, we will follow these steps:

### Step 1: Identify \( u \) and \( v \)
Let:
- \( u = x^4 + 1 \) (the numerator)
- \( v = x^2 - 1 \) (the denominator)

### Step 2: Compute the derivatives \( \frac{du}{dx} \) and \( \frac{dv}{dx} \)
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