......................ТОЛЬКО 1667.....................
A) 15/2:(1/5+1/3)=15/2*15/8=14 1/16 б) 1/9:(1/6-1/3)=1/9*36/1=4 в) (1/2+1/3)^2:(1/2-1/3)^2=25/36*36/1=25 г) (1/12+1/18):(1/12-1/18)=30/216*216/6=5