7 целых 2/3 + 4 целых 1/6 * (6 целых 2/7 - 3 целых 5/7

[latex]7 frac{2}{3} +4 frac{1}{6} (6 frac{2}{7} -3 frac{5}{7} )=7 frac{2}{3} +4 frac{1}{6} *2 frac{4}{7} =7 frac{2}{3} + frac{25}{6} * frac{18}{7} =7 frac{2}{3} +10 frac{5}{7} =[/latex]=[latex]17 frac{14+15}{21} =17 frac{19}{21} [/latex]