2_18=2_18
5_6=15_18
3_9=6_18
1_2=9_18
2_3=12_18
5_6 и 4_3= 5_6 и 8_6
3_8 и 2_2 = 3_8 и 4_8
5_8 и 2_3=15_24 и 16_14
3_5 и 1_15=9_15 и 1_15
9_10 и 3_20=18_10 и 3_20
2_18=2_18
5_6=15_18
3_9=6_18
1_2=9_18
2_3=12_18
5_6 и 4_3= 5_6 и 8_6
3_8 и 2_2 = 3_8 и 4_8
5_8 и 2_3=15_24 и 16_14
3_5 и 1_15=9_15 и 1_15
9_10 и 3_20=18_10 и 3_20