Coкратитe:
6*14/7*30
22*10/15*33
9*2*3/8*18*21
8*7+8*3/16*25-16*5

1) 84/210 = 42/105
2) 220/295 = 4/9
3)54/3024 = 1/56
4) 56+24/ 400-80 = 80/320 = 1/4