57600:9*60-5094*8=(77434+36008:4):7*50=(680267+169803):5*8=20*(700304-680738):4=

57600:9*60-5094*8 = 6400*60-5094*8 = 384000 - 40752 = 353248 (77434+36008:4):7*50 = (77434 + 9002):7*50= 86436:7*50= 12348*50 = 617400 (680267+169803):5*8= 850070:5*8 = 170014*8 = 1360112 20*(700304-680738):4= 20*19566:4 = 391320:4 = 97830