$$U_{733}(x, y) = \frac{x^{2}}{\left(1 - y\right)^{3}} + \frac{2 x}{\left(1 - y\right)^{2}} + \frac{1}{1 - y}$$

$$T_{733}(n, m, k) = {\binom{2 k}{n}} {\binom{k + m + n - 1}{m}}$$