7.3. Find the minimum value of the expression $\frac{13 x^{2}+24 x y+13 y^{2}-14 x-16 y+61}{\left(4-16 x^{2}-8 x y-y^{2}\right)^{7 / 2}}$. Round the answer to the nearest hundredths if necessary.
Answer: 0.44 (exact value: $\frac{7}{16}$ ).