14)

$$14) 1 \frac{3}{19} + \frac{1}{4} - 1 \frac{3}{19} + \frac{1}{4} = (1 \frac{3}{19} - 1 \frac{3}{19}) + (\frac{1}{4} + \frac{1}{4}) = 0 + \frac{2}{4} = \frac{1}{2}$$

Ответ: $$\frac{1}{2}$$