Как решить -8/25×15/14-11/48÷(-7/8)

-8/25×15/14-11/48÷(-7/8)
$- \frac{8}{25} * \frac{15}{14} - \frac{11}{48} :(- \frac{7}{8} )= \\ \\ =- \frac{4*2*3*5}{5*5*2*7} + \frac{11}{48} : \frac{7}{8} = \\ \\ =- \frac{4*3}{5*7} + \frac{11}{48} * \frac{8}{7} = - \frac{12}{5*7} + \frac{11*8}{6*8*7} = \\ \\ = - \frac{12}{5*7} + \frac{11}{6*7} = -\frac{12*6}{5*7*6} + \frac{11*5}{6*7*5} = \\ \\ = \frac{-72+55}{5*6*7} = \frac{-17}{210} =- \frac{17}{210}$