C = 5/6 + 7/12 x 3/5

D= 3/4x 2/9 + 28/15 x 25/14

E = ( /13 x 6/5 - 3/10) w 15/4

F = 8/7+2/2 x 3/5x 6/3

 

 

 

 

A = 7/3 x .. / .. = 28/15

B= 11/17 x ../.. = 1

C= 7/2x ../.. = 3/10

D = 1.5/2 x ../.. = 9/20.