1/2+2/3=4/2
3/4+1/8=7/8
1/12+1/16=7/48
5/18+7/24=41/72
1/32+5/64=5/64
1/48+1/42=5/112
2/3-1/3=1/3
1/4-1/8=1/8
2/5-3/10=1/10
3/8-1/12=7/24
1/2+2/3=4/2
3/4+1/8=7/8
1/12+1/16=7/48
5/18+7/24=41/72
1/32+5/64=5/64
1/48+1/42=5/112
2/3-1/3=1/3
1/4-1/8=1/8
2/5-3/10=1/10
3/8-1/12=7/24