(25 13/28-26 4/21)-(-4-1 5/24) ПОМОГИТЕ

Решите задачу:

$(25 \frac{13}{28} - 26\frac{4}{21} )-(-4- 1\frac{5}{24} )=4\frac{27}{56} \\ 1) 25 \frac{13}{28} - 26\frac{4}{21} = \frac{713}{28} - \frac{550}{21} = \frac{2139}{84} - \frac{2200}{84} =- \frac{61}{84} \\ 2) -4- 1\frac{5}{24} = -4- \frac{29}{24} =- \frac{96}{24} - \frac{29}{24} =- \frac{125}{24} =- 5\frac{5}{24} \\ 3) - \frac{61}{84}-(- 5\frac{5}{24} )=- \frac{61}{84}+5\frac{5}{24}=- \frac{61}{84}+\frac{125}{24}=- \frac{122}{168} + \frac{875}{168} = \frac{753}{168} = 4\frac{27}{56}$