[tex] = - \frac{ 3}{9} + \frac{7}{4} - \frac{38 - 3}{90} + \frac{375}{1000} \\ = - \frac{1}{3} + \frac{7}{4} - \frac{35}{90} + \frac{3}{8} \\ = - \frac{1}{3} + \frac{7}{4} - \frac{7}{18} + \frac{3}{8} \\ = \frac{ - 24 + 126 - 28 + 27}{72} \\ = \frac{101}{72} = 1 \frac{29}{72} [/tex]