$$\frac{(8,7^{2}-11,3^{2})(13^{2}-12,6^{2})}{(4,2^{2}-5,8^{2})(2,3^{2}-0,3^{2})}$$
$\frac{77059}{5472}\approx 14,082419591$
$$\frac{\left(8\times 49-11\times 3^{2}\right)\left(13^{2}-12\times 6^{2}\right)}{\left(4\times 2^{2}-5\times 8^{2}\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{\left(392-11\times 3^{2}\right)\left(13^{2}-12\times 6^{2}\right)}{\left(4\times 2^{2}-5\times 8^{2}\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{\left(392-11\times 9\right)\left(13^{2}-12\times 6^{2}\right)}{\left(4\times 2^{2}-5\times 8^{2}\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{\left(392-99\right)\left(13^{2}-12\times 6^{2}\right)}{\left(4\times 2^{2}-5\times 8^{2}\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{293\left(13^{2}-12\times 6^{2}\right)}{\left(4\times 2^{2}-5\times 8^{2}\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{293\left(169-12\times 6^{2}\right)}{\left(4\times 2^{2}-5\times 8^{2}\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{293\left(169-12\times 36\right)}{\left(4\times 2^{2}-5\times 8^{2}\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{293\left(169-432\right)}{\left(4\times 2^{2}-5\times 8^{2}\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{293\left(-263\right)}{\left(4\times 2^{2}-5\times 8^{2}\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{-77059}{\left(4\times 2^{2}-5\times 8^{2}\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{-77059}{\left(4\times 4-5\times 8^{2}\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{-77059}{\left(16-5\times 8^{2}\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{-77059}{\left(16-5\times 64\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{-77059}{\left(16-320\right)\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{-77059}{-304\left(2\times 3^{2}-0\times 3^{2}\right)}$$
$$\frac{-77059}{-304\left(2\times 9-0\times 3^{2}\right)}$$
$$\frac{-77059}{-304\left(18-0\times 3^{2}\right)}$$
$$\frac{-77059}{-304\left(18-0\times 9\right)}$$
$$\frac{-77059}{-304\left(18-0\right)}$$
$$\frac{-77059}{-304\times 18}$$
$$\frac{-77059}{-5472}$$
$$\frac{77059}{5472}$$
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$\frac{263 \cdot 293}{2 ^ {5} \cdot 3 ^ {2} \cdot 19} = 14\frac{451}{5472} = 14.082419590643275$
