3. Вычислите: $$5\frac{13}{18} \cdot 1\frac{1}{8} + (7\frac{1}{4})^2$$.

3. Вычислите:

$$5\frac{13}{18} \cdot 1\frac{1}{8} + (7\frac{1}{4})^2 = \frac{5 \cdot 18 + 13}{18} \cdot \frac{1 \cdot 8 + 1}{8} + (\frac{7 \cdot 4 + 1}{4})^2 = \frac{103}{18} \cdot \frac{9}{8} + (\frac{29}{4})^2 = \frac{103}{18} \cdot \frac{9}{8} + \frac{841}{16} = \frac{103 \cdot 9}{18 \cdot 8} + \frac{841}{16} = \frac{103 \cdot 1}{2 \cdot 8} + \frac{841}{16} = \frac{103}{16} + \frac{841}{16} = \frac{103 + 841}{16} = \frac{944}{16} = 59$$

Ответ: 59