$$U_{1058}(x, y) = \frac{\left(1 - \sqrt{1 - 4 x}\right)^{2} \left(y + 1\right)^{3}}{4 x^{2}}$$

$$T_{1058}(n, m, k) = \frac{2 k {\binom{3 k}{m}} {\binom{2 k + 2 n - 1}{n}}}{2 k + n}$$