(800/9-800/9)
10/16
( 7/5 -6/5) + ( 9/5-8/5)
(3/4 + 8/4) x (8/4 -5/4)
1/4+3/4 x 2/3
16/4
( 5/2 + 6/2 ) - (8/2+9/2)
(1/3 x 2/3)+10/9 -12/9
33/16
8/12
2/4+4/4+8/4+2/4
14/12
1/3+2/3+4/3-7/3
(2/4 x 2/4) +2/16+4/16
