260/21
Объяснение:
(7+6)²/7+3×2×7+6/7²-36
169/21×20/49-36
169/21×20/13=260/21=12 8/21
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260/21
Объяснение:
(7+6)²/7+3×2×7+6/7²-36
169/21×20/49-36
169/21×20/13=260/21=12 8/21