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1. 4\3 + 2\6 - 5\3 + 4\6 = 6\6 - \3
2. 6 + \3 (4 - 2\3) = 6 + 4\3 - 2\9
= 6 + 4\3 - (2×3)
= 6 + 4\3 - 6
= 4\3
3. \7 + \2\10 = \7 + 2.10 = \7 + 20 atau 20 + \7