\[\begin{eqnarray}
\large t(x)&=&\frac{1}{\sqrt{x^{2}-a^{2}}} \\ \large h(x)&=&\frac{1}{\sqrt{a^{2}-x^{2}}} \\ \large b(x)&=&\frac{1}{\sqrt{x^{2}+a^{2}}} \end{eqnarray} \]

Let there be three functions: the trunk, the hamper and the bell as described above.

In pairs, they are to one another asymptotically, except for the bell and the hamper, which effectively meet each other.

Find the red area when \(a=0.5 \).

**Details and assumptions**:

The drawing was an attempt to indicate that they "touch" each other. I'm not good at this, though.

Can you find a general formula for the area as a function of \(a\)?

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