57600:960-50948=(77434+36008:4):750=(680267+169803):58=20*(700304-680738):4=

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

Let's solve step by step:

57600: 9 60 - 5094 8 = 57600: 540 - 40752 = 72 - 40752 = -40680 (D)

(D) = (77434 + 36008 : 4) : 7 50 => -40680 = (77434 + 36008 : 4) : 7 50 => -40680 = (77434 + 9002) : 7 50 => -40680 = 86436 : 7 50 = 12348 * 50 = 617400 (F)

(E) = (680267 + 169803) : 5 8 => 617400 = 850070 : 5 8 = 850070 : 5 8 = 170014 8 = 1360112 (G)

(F) = 20 (700304 - 680738) : 4 => 1360112 = 20 19666 : 4 => 1360112 = 393320 : 4 = 98330

So, the final answer is 98330.