3 7/19×(5/12+3/8):1 1/3-1 1/8:(1 1/5-1/4) помогите решить пример с дробями​

[tex]3 \frac{7}{19} \times ( \frac{5}{12} + \frac{3}{8} ) \div 1 \frac{1}{3} - 1 \frac{1}{8} \div (1 \frac{1}{5} - \frac{1}{4} ) = \frac{31}{38} \\ 1) \: \frac{5}{12} + \frac{3}{8 } = \frac{10 +9 }{24} = \frac{19}{24} \\ 2) \: 3 \frac{7}{19} \times \frac{19}{24} \div 1 \frac{1}{3} = \frac{64 \times 19 \times 3}{19 \times 24 \times 4} = 2 \\ 3) \: 1 \frac{1}{5} - \frac{1}{4} = \frac{24}{20} - \frac{5}{20} = \frac{19}{20} \\ 4) \: 1 \frac{1}{8} \div \frac{19}{20} = \frac{9 \times 20}{8 \times 19} = \frac{45}{38} = 1 \frac{7}{38} \\ 5) \: 2 - 1 \frac{7}{38} = 1 \frac{38}{38} - 1 \frac{7}{38} = \frac{31}{38} [/tex]