$$U_{46}(x, y) = \frac{x + \sqrt{x^{2} - 2 x + y \left(4 x - 4\right) + 1} - 1}{y \left(2 x - 2\right)}$$

$$T_{46}(n, m, k) = \frac{k {\binom{k + 2 m}{m}} {\binom{k + m + n - 1}{n}}}{k + 2 m}$$