Помогите решить (43/9-17/16):14/9+4/9*99/16=

(43/9-17/16):14/9+4/9*99/16=2 87/224

1) 43/9 -  17 /16 = 688/144 -153/144 = 535/144
2)535/144 * 9/14 = 535/224
3) 4/9 * 99/16 = 11/4
4) 535/224 + 11/4=1151/224 =5 31/224