$$U_{736}(x, y) = x^{2} \left(y + 1\right)^{6} + 2 x \left(y + 1\right)^{4} + \left(y + 1\right)^{2}$$

$$T_{736}(n, m, k) = {\binom{2 k}{n}} {\binom{2 k + 2 n}{m}}$$