Решите пожалуйста все

2)
$(5 \frac{3}{8} + 18 \frac{1}{2} - 7 \frac{5}{24} ) \div 16 \frac{2}{3} = ( \frac{43}{8} + \frac{37}{2} - \frac{173}{24} ) \div \frac{50}{3} = ( \frac{129}{24} + \frac{444}{24} - \frac{173}{24} ) \times \frac{3}{50} = \frac{400}{24} \times \frac{3}{50} = \frac{8}{8} = 1$
3)
$(12 \frac{5}{12} + 1 \frac{2}{3} - 3 \frac{5}{6} + 2 \frac{3}{4} ) \div (2 \frac{1}{2} \times \frac{2}{5} - \frac{7}{9} ) = ( \frac{149}{12} + \frac{5}{3} - \frac{23}{6} + \frac{11}{4} ) \div ( \frac{5}{2} \times \frac{2}{5} - \frac{7}{9} ) = ( \frac{149}{12} + \frac{20}{12} - \frac{46}{12} + \frac{33}{12} ) \div (1 - \frac{7}{9} ) = \frac{156}{12} \div \frac{2}{9} = 13 \times \frac{9}{2} = \frac{117}{2} = 58 \frac{1}{2}$
4)
$48 \frac{3}{5} \div 6 \frac{3}{4} \times \frac{5}{12} - 2 \frac{5}{6} + 1 \frac{75}{94} \times (1 \frac{1}{2} \times \frac{1}{3} - \frac{13}{26} ) = \frac{243}{5} \div \frac{27}{4} \times \frac{5}{12} - \frac{17}{6} + \frac{169}{94} \times ( \frac{3}{2} \times \frac{1}{3} - \frac{1}{2} ) = \frac{243}{5} \times \frac{4}{27} \times \frac{5}{12} - \frac{17}{6} + \frac{169}{94} \times ( \frac{1}{2} - \frac{1}{2}) = 3 - \frac{17}{6} + \frac{169}{94} \times 0 = \frac{18}{6} - \frac{17}{6} = \frac{1}{6}$