$$U_{1088}(x, y) = \frac{\left(- 2 x - \sqrt{1 - 4 x} + 1\right)^{2} \left(- 2 y - \sqrt{1 - 4 y} + 1\right)^{2}}{16 x^{4} y^{4}}$$

$$T_{1088}(n, m, k) = \frac{4 k^{2} {\binom{4 k + 2 m}{m}} {\binom{4 k + 2 n}{n}}}{\left(2 k + m\right) \left(2 k + n\right)}$$