$$U_{760}(x, y) = \frac{y^{2} \left(1 - \sqrt{- \frac{2 x \left(1 - \sqrt{1 - 4 y}\right)}{y} + 1}\right)^{3}}{2 x^{3} \left(1 - \sqrt{1 - 4 y}\right)^{2}}$$

$$T_{760}(n, m, k) = \frac{3 k \left(k + n\right) {\binom{3 k + 2 n}{n}} {\binom{k + 2 m + n - 1}{m}}}{\left(3 k + 2 n\right) \left(k + m + n\right)}$$