Answer :

Let's simplify the given expression step by step:

[tex]\[ = 2 + \frac{\frac{b^4 - 4a^2c^2}{a^4}}{\frac{c^2}{a^2}} - \frac{2c^2}{a^2} \][/tex]

1. Simplify the fraction [tex]\(\frac{\frac{b^4 - 4a^2c^2}{a^4}}{\frac{c^2}{a^2}}\)[/tex]:

First, simplify the overall fraction:

[tex]\[ \frac{\frac{b^4 - 4a^2c^2}{a^4}}{\frac{c^2}{a^2}} = \frac{b^4 - 4a^2c^2}{a^4} \cdot \frac{a^2}{c^2} \][/tex]

2. Combine and simplify:

[tex]\[ = \frac{(b^4 - 4a^2c^2) \cdot a^2}{a^4 \cdot c^2} \][/tex]
Simplify the expression by combining the [tex]\( a^2 \)[/tex] terms:

[tex]\[ = \frac{b^4 - 4a^2c^2}{a^2c^2} \][/tex]

3. Combine this result back into the original expression:

Now we have the simplified middle term:

[tex]\[ = 2 + \frac{b^4 - 4a^2c^2}{a^2c^2} - \frac{2c^2}{a^2} \][/tex]

4. Distribute the fraction in the middle term:

Separate the fraction:

[tex]\[ = 2 + \frac{b^4}{a^2c^2} - \frac{4a^2c^2}{a^2c^2} - \frac{2c^2}{a^2} \][/tex]

5. Simplify the fraction [tex]\(\frac{4a^2c^2}{a^2c^2}\)[/tex]:

[tex]\[ = \frac{4a^2c^2}{a^2c^2} = 4 \][/tex]

Plugging this back into the expression:

[tex]\[ = 2 + \frac{b^4}{a^2c^2} - 4 - \frac{2c^2}{a^2} \][/tex]

6. Combine the constants and simplify:

[tex]\[ = (2 - 4) + \frac{b^4}{a^2c^2} - \frac{2c^2}{a^2} \][/tex]
[tex]\[ = -2 + \frac{b^4}{a^2c^2} - \frac{2c^2}{a^2} \][/tex]

The final simplified expression is:

[tex]\[ -2 + \frac{b^4}{a^2c^2} - \frac{2c^2}{a^2} \][/tex]

This is the simplified form of the given expression.