common denominator
3/7+2\5
5\12
3x5
15
Length=3
width=5
Hight= 9
172
359+472
831
349-73
276
3\6+5\5
8\11
6x7
42
length=2
width=4
hight=7
56
926+23
949
284-264
22
8\9-6\8
2\1
8x12
96
length=9
width=9
hight=9
729
842+592
1434
793-163
630
3\5+9\10
12\15
11x11
121
length=7
width=11
hight=5
385
444+2853
3297
2839-833
2006
35\90+24\67
59\157
12x12
144
length=12
width=12
hight=15
2160
9364+5132
14496
9923-7294
2629