① (\frac{5}{19} + \frac{14}{42}) \cdot 18=

① ($$\frac{5}{19} + \frac{14}{42}$$) $$\cdot$$ 18=

$$\frac{14}{42}$$ = $$\frac{1}{3}$$

$$\frac{5}{19} + \frac{1}{3}$$ = $$\frac{5 \cdot 3 + 1 \cdot 19}{19 \cdot 3}$$ = $$\frac{15 + 19}{57}$$ = $$\frac{34}{57}$$

$$\frac{34}{57} \cdot 18$$ = $$\frac{34 \cdot 18}{57}$$ = $$\frac{34 \cdot 6}{19}$$ = $$\frac{204}{19}$$ = 10$$\frac{14}{19}$$

Ответ: 10$$\frac{14}{19}$$