(7/16+5/12)*1целых7/41+1целых1/39:(4/13- 20/39)
/-типо дробь

(7/16+5/12)*1целых7/41+1целых1/39:(4/13- 20/39)=1) 7/16+5/12= 21/48+20/48= 41/482) 41/48*1 7/41= 41/48*48/41= 13) 4/13-20/39= 12/39-20/39= -8/394) 1 1/39:(-8/39)=40/39:(-8/39)= 40/39*(-39/8)= -55) 1+(-5)= 1-5= -4